The Reading / Listening - Sun Dimming - Level 6

Scientists have come up with a revolutionary new idea to save planet Earth from global warming. Geo-engineers from Harvard University believe that spraying "sun-dimming" chemicals into the stratosphere high above the Earth could slow down global warming. They also say their technique would be "remarkably inexpensive," costing in the region of $2.25 billion a year over a 15-year period. The technique is known as stratospheric aerosol injection (SAI). It is still in its infancy and is yet to be proven. It would involve the use of gigantic hoses or high-powered chemical cannons to spray chemicals into the stratosphere to act as a reflective barrier against sunlight and harmful UV rays.



The scientists have admitted that their idea is currently still in the planning stages. They said: "We make no judgment about the desirability of SAI. We simply show that a hypothetical deployment program commencing 15 years hence, while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective." Not all scientists think the idea is a good one. Some think it is somewhat pie in the sky. They say it would require a fleet of 100 specially-designed planes to make 4,000 missions a year, crossing most of the globe's airspace. This would require permission from over 100 governments. There are also concerns it could increase droughts and extreme weather.

Try the same news story at these easier levels:

    Sun Dimming - Level 4  or  Sun Dimming - Level 5

Sources
  • https://science.slashdot.org/story/18/11/23/2016234/controversial-spraying-sun-dimming-method-aims-to-curb-global-warming
  • https://nypost.com/2018/11/23/sun-dimming-chemicals-could-solve-climate-change-on-the-cheap/
  • https://physicsworld.com/a/could-an-anti-global-warming-atmospheric-spraying-program-really-work/


Make sure you try all of the online activities for this reading and listening - There are dictations, multiple choice, drag and drop activities, crosswords, hangman, flash cards, matching activities and a whole lot more. Please enjoy :-)



Warm-ups

1. GLOBAL WARMING: Students walk around the class and talk to other students about global warming. Change partners often and share your findings.
2. CHAT: In pairs / groups, talk about these topics or words from the article. What will the article say about them? What can you say about these words and your life?
       scientists / revolutionary / global warming / chemicals / technique / barrier / UV rays /
       planning / judgment / hypothetical / ambitious / pie / missions / permission / drought
Have a chat about the topics you liked. Change topics and partners frequently.
3. SUN DIMMING: Students A strongly believe sun dimming is a workable idea; Students B strongly believe it isn't.  Change partners again and talk about your conversations.
4. SAVING PLANET EARTH: How do we do it? What do you think of these ideas? Complete this table with your partner(s). Change partners often and share what you wrote.

 

Good idea?

Why / Why not?

Sun dimming

 

 

Solar energy

 

 

Electric cars

 

 

Veganism

 

 

Grow your own food

 

 

Walk everywhere

 

 

MY e-BOOK
ESL resource book with copiable worksheets and handouts - 1,000 Ideas and Activities for Language Teachers / English teachers
See a sample

5. PLANET: Spend one minute writing down all of the different words you associate with the word "planet". Share your words with your partner(s) and talk about them. Together, put the words into different categories.
6. EXTREME WEATHER: Rank these with your partner. Put the worst weather events at the top. Change partners often and share your rankings.

  • heat waves
  • forest fires
  • rising sea levels
  • tornados
  • droughts
  • hurricanes
  • blizzards
  • floods

 

Vocabulary

    Paragraph 1

      1. come up with a. To a surprising degree; in a way that is worthy of attention.
      2. revolutionary b. Push or force a liquid or gas (especially a drug or vaccine) into a person or animal's body or something else with a syringe or similar device.
      3. remarkably c. Think of a new idea.
      4. in the region of d. Involving or causing a complete or dramatic change.
      5. aerosol e. About; approximately.
      6. injection f. a substance enclosed under pressure and able to be released as a fine spray; a container holding an aerosol.
      7. barrier g. A fence or other obstacle that prevents movement or access to or over something.

    Paragraph 2

      8. judgment h. A particular attitude toward or way of regarding something; a point of view.
      9. desirability i. The ability to make considered decisions or come to sensible conclusions.
      10. hypothetical j. Having or showing a strong desire and determination to succeed.
      11. ambitious k. Something that is nice to think about but is very unlikely to happen.
      12. perspective l. The quality of being wanted, or of being attractive.
      13. pie in the sky m. A prolonged period of abnormally low rainfall, leading to a shortage of water.
      14. droughts n. An explanation or theory made on the basis of limited evidence as a starting point for further investigation.

 

Before reading / listening

1. TRUE / FALSE: Read the headline. Guess if 1-8 below are true (T) or false (F).

  1. Scientists say they can revolutionize how the Earth is warmed globally.    T / F
  2. The scientists are geo-engineers from Harvard University.     T / F
  3. Scientists want to slow down the earth to dim the Sun's UV rays.     T / F
  4. Scientists say giant hoses will spray chemicals into the stratosphere.     T / F
  5. The sun-dimming plan is in the final stages of planning.     T / F
  6. The scientists say it's possible to use their technique in 15 years' time.    T / F
  7. Some scientists believe the sun-dimming idea is pie in the sky.     T / F
  8. Other scientists said sun-dimming could help to end all droughts.     T / F

2. SYNONYM MATCH: Match the following synonyms from the article.

  1. revolutionary
  2. technique
  3. in the region of
  4. infancy
  5. harmful
  6. admitted
  7. desirability
  8. somewhat
  9. missions
  10. extreme
  1. approximately
  2. acknowledged
  3. damaging
  4. severe
  5. a bit
  6. early stages
  7. innovative
  8. trips
  9. appeal
  10. method

3. PHRASE MATCH: (Sometimes more than one choice is possible.)

  1. Scientists have come up with a
  2. their technique would be
  3. It is still in its
  4. spray chemicals into
  5. a reflective barrier
  6. their idea is currently still in the
  7. technically possible from
  8. make 4,000
  9. require permission
  10. it could increase droughts
  1. infancy
  2. from over 100 governments
  3. against sunlight
  4. planning stages
  5. and extreme weather
  6. revolutionary new idea
  7. missions a year
  8. remarkably inexpensive
  9. the stratosphere
  10. an engineering perspective

Gap fill

Put these words into the spaces in the paragraph below.
technique
proven
barrier
revolutionary
region
hoses
spraying
aerosol

Scientists have come up with a (1) ____________ new idea to save planet Earth from global warming. Geo-engineers from Harvard University believe that (2) ____________ "sun-dimming" chemicals into the stratosphere high above the Earth could slow down global warming. They also say their (3) ____________ would be "remarkably inexpensive," costing in the (4) ____________ of $2.25 billion a year over a 15-year period. The technique is known as stratospheric (5) ____________ injection (SAI). It is still in its infancy and is yet to be (6) ____________. It would involve the use of gigantic (7) ____________ or high-powered chemical cannons to spray chemicals into the stratosphere to act as a reflective (8) ____________ against sunlight and harmful UV rays.

Put these words into the spaces in the paragraph below.
technically
desirability
missions
currently
extreme
pie
hence
require

The scientists have admitted that their idea is (9) ____________ still in the planning stages. They said: "We make no judgment about the (10) ____________ of SAI. We simply show that a hypothetical deployment program commencing 15 years (11) ____________, while both highly uncertain and ambitious, would indeed be (12) ____________ possible from an engineering perspective." Not all scientists think the idea is a good one. Some think it is somewhat (13) ____________ in the sky. They say it would require a fleet of 100 specially-designed planes to make 4,000 (14) ____________ a year, crossing most of the globe's airspace. This would (15) ____________ permission from over 100 governments. There are also concerns it could increase droughts and (16) ____________ weather.

Listening — Guess the answers. Listen to check.

1)  Geo-engineers from Harvard University believe that spraying ______
     a.  "sun-dam in" chemical
     b.  "sun-damming" chemicals
     c.  "sun-dim in" chemicals
     d.  "sun-dimming" chemicals
2)  They also say their technique would be ______
     a.  remarkable in expensive
     b.  remarkably in expansive
     c.  remarkably inexpensive
     d.  remarkably in expends it
3)  The technique is known as stratospheric ______
     a.  aero sold injection
     b.  air a sold injection
     c.  air a soul injection
     d.  aerosol injection
4) gigantic hoses or high-powered chemical cannons to spray chemicals ______
     a.  into the stratosphere
     b.  into the atmosphere
     c.  into the starter sphere
     d.  into the slats of sphere
5)  act as a reflective barrier against sunlight and ______
     a.  harmfully UV raids
     b.  harmed full UB rays
     c.  harmful UB raids
     d.  harmful UV rays

6)  The scientists have admitted that their idea is currently still in ______
     a.  the plan in stages
     b.  the planning stages
     c.  the plane in stages
     d.  the panning stages
7)  be technically possible from an ______
     a.  engineering per specter
     b.  engineering perspectives
     c.  engineering perspective
     d.  engineering per sectors
8)  Some think it is somewhat ______
     a.  spy inner sky
     b.  pies on the sky
     c.  pie inner sky
     d.  pie in the sky
9)  planes to make 4,000 missions a year, crossing most of ______
     a.  the globe's airspace
     b.  the globe stair space
     c.  the globe says space
     d.  the globe's airs pace
10)  There are also concerns it could increase droughts ______
     a.  and extremely weather
     b.  and extreme weather
     c.  and extremely weathered
     d.  and extreme weathered

Listening — Listen and fill in the gaps

Scientists (1) ___________________ with a revolutionary new idea to save planet Earth from global warming. Geo-engineers from Harvard University believe that spraying "sun-dimming" (2) ___________________ stratosphere high above the Earth could slow down global warming. They also say their technique would be "remarkably inexpensive," (3) ___________________ region of $2.25 billion a year over a 15-year period. The technique is known as stratospheric aerosol injection (SAI). It is still (4) ___________________ and is yet to be proven. It would involve the use of gigantic hoses or high-powered chemical cannons to spray (5) ___________________ stratosphere to act as a reflective (6) ___________________ and harmful UV rays.

The scientists have admitted that their (7) ___________________ still in the planning stages. They said: "We make no judgment (8) ___________________ of SAI. We simply show that a hypothetical deployment program commencing (9) ___________________, while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective." Not all scientists think the idea is a good one. Some think it is somewhat (10) ___________________ sky. They say it would require a fleet of 100 specially-designed planes to make 4,000 missions a year, crossing most of (11) ___________________. This would require permission from over 100 governments. There are also concerns it could increase (12) ___________________ weather.

Comprehension questions

  1. What kind of scientists came up with the sun-dimming plan?
  2. Where would the scientists spray chemicals?
  3. How much would the sun-dimming plan cost?
  4. What would spray the chemicals?
  5. What would the chemicals act as?
  6. Where did the scientists say their idea is?
  7. When might sun dimming be implemented?
  8. What did more doubtful scientists call the idea?
  9. How many missions might specially-designed planes have to make?
  10. What do more skeptical scientists say could increase?




Multiple choice quiz

1)  What kind of scientists came up with the sun-dimming plan?
a) cosmos engineers
b) geo-engineers
c) astro-engineers
d) bio-engineers
2) Where would the scientists spray chemicals?
a) behind the clouds
b) into the atmosphere
c) as far away as Mars
d) into the stratosphere
3) How much would the sun-dimming plan cost?
a) $2.5 billion a year
b) $2.25 billion a year
c) $22 billion a year
d) $25 billion a year
4) What would spray the chemicals?
a) gigantic hoses
b) aerosol cans
c) a special missile launcher
d) rockets
5) What would the chemicals act as?
a) a UV ray
b) a reflective barrier
c) a defective barrier
d) a solar barrier

6) Where did the scientists say their idea is?
a) in the planning stages
b) up in the air
c) in a scientist's inbox
d) with the government
7) When might sun dimming be implemented?
a) 2050
b) in the next century
c) in 15 years from now
d) 2025
8) What did more doubtful scientists call the idea?
a) pie in the sky
b) a pipe dream
c) stratospheric
d) like cheese on the Moon
9) How many missions might specially-designed planes have to make?
a) 5,000
b) 6,000
c) 3,000
d) 4,000
10) What do more skeptical scientists say could increase?
a) boughs
b) coughs
c) droughts
d) draughts

Role play

Role  A – Droughts
You think droughts are the worst weather events. Tell the others three reasons why. Tell them why their events aren't as bad. Also, tell the others which is the least dangerous of these (and why): hurricanes, heat waves or floods.

Role  B – Hurricanes
You think hurricanes are the worst weather events. Tell the others three reasons why. Tell them why their events aren't as bad. Also, tell the others which is the least dangerous of these (and why): droughts, heat waves or floods.

Role  C – Heat Waves
You think heat waves are the worst weather events. Tell the others three reasons why. Tell them why their events aren't as bad. Also, tell the others which is the least dangerous of these (and why): hurricanes, droughts or floods.

Role  D – Floods
You think floods are the worst weather events. Tell the others three reasons why. Tell them why their events aren't as bad. Also, tell the others which is the least dangerous of these (and why): hurricanes, heat waves or droughts.

After reading / listening

1. WORD SEARCH: Look in your dictionary / computer to find collocates, other meanings, information, synonyms … for the words...

'global'

  • ________________
  • ________________
  • ________________
  • ________________
  • ________________
  • ________________
  • ________________
  • ________________
  • and 'warming'.

  • ________________
  • ________________
  • ________________
  • ________________
  • ________________
  • ________________
  • ________________
  • ________________
  • • Share your findings with your partners.

    • Make questions using the words you found.

    • Ask your partner / group your questions.

    2. ARTICLE QUESTIONS: Look back at the article and write down some questions you would like to ask the class about the text.

    •Share your questions with other classmates / groups. •Ask your partner / group your questions.

    3. GAP FILL: In pairs / groups, compare your answers to this exercise. Check your answers. Talk about the words from the activity. Were they new, interesting, worth learning…?

    4. VOCABULARY: Circle any words you do not understand. In groups, pool unknown words and use dictionaries to find their meanings.

    5. TEST EACH OTHER: Look at the words below. With your partner, try to recall how they were used in the text:

    • stages
    • make
    • show
    • possible
    • 4,000
    • also
    • come
    • high
    • region
    • known
    • yet
    • against




    Student survey

    Write five GOOD questions about this topic in the table. Do this in pairs. Each student must write the questions on his / her own paper. When you have finished, interview other students. Write down their answers.

    (Please look at page 12 of the PDF to see a photocopiable example of this activity.)

    Discussion - Dim the Sun to limit global warming, say scientists

    STUDENT A’s QUESTIONS (Do not show these to student B)

    1. What did you think when you read the headline?
    2. What images are in your mind when you hear the word 'global'?
    3. What do you think of the idea of sun dimming?
    4. Do you think sun dimming would work?
    5. How serious a problem is global warming?
    6. What do you know about global warming?
    7. How has global warming affected you?
    8. How has global warming affected your country?
    9. How much do you worry about global warming?
    10. What harm can UV rays do?

    STUDENT B’s QUESTIONS (Do not show these to student A)

    1. Did you like reading this article? Why/not?
    2. What do you think of when you hear the word 'sun'?
    3. What do you think about what you read?
    4. How likely is it that sun dimming will go ahead?
    5. What other ideas do you think are "pie in the sky"?
    6. Would the world agree to sun dimming?
    7. What would happen if sun dimming cooled our planet?
    8. What extreme weather might sun dimming bring?
    9. What are your ideas to reduce global warming?
    10. What questions would you like to ask the scientists?

    Discussion — Write your own questions

    STUDENT A’s QUESTIONS (Do not show these to student B)

    (a) ________________

    (b) ________________

    (c) ________________

    (d) ________________

    (e) ________________

    STUDENT B’s QUESTIONS (Do not show these to student A)

    (f) ________________

    (g) ________________

    (h) ________________

    (i) ________________

    (j) ________________





    Language — Cloze (Gap-fill)

    Scientists have come (1) ____ with a revolutionary new idea to save planet Earth from global warming. Geo-engineers from Harvard University (2) ____ that spraying "sun-dimming" chemicals into the stratosphere (3) ____ above the Earth could slow down global warming. They also say their technique would be "remarkably inexpensive," costing (4) ____ the region of $2.25 billion a year over a 15-year period. The technique is known as stratospheric aerosol injection (SAI). It is still in its (5) ____ and is yet to be proven. It would involve the use of gigantic hoses or high-powered chemical cannons to spray chemicals into the stratosphere to act as a reflective barrier against sunlight and (6) ____ UV rays.

    The scientists have (7) ____ that their idea is currently still in the planning stages. They said: "We make no judgment about the (8) ____ of SAI. We simply show that a hypothetical deployment program commencing 15 years (9) ____, while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective." Not all scientists think the idea is a good one. Some think it is somewhat (10) ____ in the sky. They say it would require a (11) ____ of 100 specially-designed planes to make 4,000 missions a year, crossing most of the globe's airspace. This would require permission from over 100 governments. There are also concerns it could increase droughts and (12) ____ weather.

    Which of these words go in the above text?

    1. (a)     in     (b)     up     (c)     on     (d)     down    
    2. (a)     believing     (b)     believer     (c)     belief     (d)     believe    
    3. (a)     height     (b)     high     (c)     up     (d)     increase    
    4. (a)     on     (b)     at     (c)     in     (d)     as    
    5. (a)     infancy     (b)     childhood     (c)     babyhood     (d)     primary    
    6. (a)     harmful     (b)     harmed     (c)     harm     (d)     harms    
    7. (a)     permitted     (b)     committed     (c)     remitted     (d)     admitted    
    8. (a)     desirability     (b)     desires     (c)     desire     (d)     desirable    
    9. (a)     once     (b)     hence     (c)     ounce     (d)     chance    
    10. (a)     tart     (b)     donut     (c)     pie     (d)     cookie    
    11. (a)     sleet     (b)     bleat     (c)     fleet     (d)     pleat    
    12. (a)     extremity     (b)     extreme     (c)     extremes     (d)     extremely

    Spelling

    Paragraph 1

    1. a luoeorviyatrn new idea
    2. "sun-dimming" lccmehsai
    3. into the srhttpeasroe high above the Earth
    4. their echquntei would be remarkably inexpensive
    5. sroaelo injection
    6. a fevlirteec barrier

    Paragraph 2

    1. We make no ungdtjme
    2. a pyhehltaocti deployment program
    3. uncertain and mobtiuisa
    4. This would require prsoniimse
    5. it could increase utgrdsho
    6. eeexrmt weather

    Put the text back together

    (...)  engineers from Harvard University believe that spraying "sun-dimming" chemicals into the
    (...)  be "remarkably inexpensive," costing in the region of $2.25 billion a year over a 15-year
    (...) Scientists have come up with a revolutionary new idea to save planet Earth from global warming. Geo-
    1  )  The scientists have admitted that their idea is currently still in the planning stages. They said:
    (...)  period. The technique is known as stratospheric aerosol injection (SAI). It is still in its infancy and is yet to be
    (...)  into the stratosphere to act as a reflective barrier against sunlight and harmful UV rays.
    (...)  missions a year, crossing most of the globe's airspace. This would require permission from
    (...)  in the sky. They say it would require a fleet of 100 specially-designed planes to make 4,000
    (...)  possible from an engineering perspective." Not all scientists think the idea is a good one. Some think it is somewhat pie
    (...)  "We make no judgment about the desirability of SAI. We simply show that a hypothetical deployment program commencing
    (...)  stratosphere high above the Earth could slow down global warming. They also say their technique would
    (...)  15 years hence, while both highly uncertain and ambitious, would indeed be technically
    (...)  proven. It would involve the use of gigantic hoses or high-powered chemical cannons to spray chemicals
    (...)  over 100 governments. There are also concerns it could increase droughts and extreme weather.

    Put the words in the right order

    1. up   a   come   Scientists   revolutionary   idea   .   with   have
    2. into   chemicals   Spraying   the   "sun-dimming"   stratosphere   .
    3. stratospheric   The   injection   .   known   is   as   technique   aerosol
    4. chemical   High-powered   cannons   to   spray   chemicals   .
    5. act   a   against   sunlight   .   barrier   as   reflective   To
    6. planning   in   the   currently   stages   .   Their   is   idea
    7. about   judgment   the   no   We   make   desirability   .
    8. the   think   a   good   one   .   idea   is   Scientists
    9. think   the   it   pie   is   sky   .   Some   in
    10. are   droughts   .   increase   also   concerns   There   could   it

    Circle the correct word (20 pairs)

    Scientists have come down / up with a revolutionary new idea to save planet Earth from global warming. Geo-engineers from Harvard University belief / believe that spraying "sun-dimming" chemicals unto / into the stratosphere high above the Earth could slow down / downed global warming. They also say their technique would be "remarkable / remarkably inexpensive," costing in the region of $2.25 billion a year over / under a 15-year period. The technique is known was / as stratospheric aerosol injection (SAI). It is still in its infancy / infants and is yet to be proven. It would involve the use of gigantic hose / hoses or high-powered chemical cannons to spray chemicals into the stratosphere to act as a reflective barrier against sunlit / sunlight and harmful UV rays.

    The scientists have admitted / admission that their idea is currently still in the planning stages / staggers. They said: "We make no judgment / judge about the desirability of SAI. We simply show / shown that a hypothetical deployment program commencing 15 years once / hence, while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective." Not all scientists think the idea / idealism is a good one. Some think it is somewhat spy / pie in the sky. They say it would require a fleet / fleece of 100 specially-designed planes to make 4,000 missions a year, crossing most of the globe's airspace. This would requirement / require permission from over 100 governments. There are also concerns it could increase draughts / droughts and extreme weather.

    Talk about the connection between each pair of words in italics, and why the correct word is correct.

    Insert the vowels (a, e, i, o, u)

    S c__ n t_s t s h_v_ c_m_ _p w_t h _ r_v_l_t__ n_r y n_w _d__ t_ s_v_ p l_n_t E_r t h f r_m g l_b_l w_r m_n g . G__ -_n g_n__ r s f r_m H_r v_r d U n_v_r s_t y b_l__ v_ t h_t s p r_y_n g " s_n - d_m m_n g " c h_m_c_l s _n t_ t h_ s t r_t_s p h_r_ h_g h _b_v_ t h_ E_r t h c__ l d s l_w d_w n g l_b_l w_r m_n g . T h_y _l s_ s_y t h__ r t_c h n_q__ w__ l d b_ " r_m_r k_b l y _n_x p_n s_v_, " c_s t_n g _n t h_ r_g__ n _f $ 2 . 2 5 b_l l__ n _ y__ r _v_r _ 1 5 - y__ r p_r__ d . T h_ t_c h n_q__ _s k n_w n _s s t r_t_s p h_r_c __ r_s_l _n j_c t__ n ( S A I ) . I t _s s t_l l _n _t s _n f_n c y _n d _s y_t t_ b_ p r_v_n . I t w__ l d _n v_l v_ t h_ _s_ _f g_g_n t_c h_s_s _r h_g h - p_w_r_d c h_m_c_l c_n n_n s t_ s p r_y c h_m_c_l s _n t_ t h_ s t r_t_s p h_r_ t_ _c t _s _ r_f l_c t_v_ b_r r__ r _g__ n s t s_n l_g h t _n d h_r m f_l U V r_y s .

    T h_ s c__ n t_s t s h_v_ _d m_t t_d t h_t t h__ r _d__ _s c_r r_n t l y s t_l l _n t h_ p l_n n_n g s t_g_s . T h_y s__ d : " W_ m_k_ n_ j_d g m_n t _b__ t t h_ d_s_r_b_l_t y _f S A I . W_ s_m p l y s h_w t h_t _ h y p_t h_t_c_l d_p l_y m_n t p r_g r_m c_m m_n c_n g 1 5 y__ r s h_n c_, w h_l_ b_t h h_g h l y _n c_r t__ n _n d _m b_t___s , w__ l d _n d__ d b_ t_c h n_c_l l y p_s s_b l_ f r_m _n _n g_n__ r_n g p_r s p_c t_v_. " N_t _l l s c__ n t_s t s t h_n k t h_ _d__ _s _ g__ d _n_. S_m_ t h_n k _t _s s_m_w h_t p__ _n t h_ s k y . T h_y s_y _t w__ l d r_q__ r_ _ f l__ t _f 1 0 0 s p_c__ l l y - d_s_g n_d p l_n_s t_ m_k_ 4 , 0 0 0 m_s s__ n s _ y__ r , c r_s s_n g m_s t _f t h_ g l_b_' s __ r s p_c_. T h_s w__ l d r_q__ r_ p_r m_s s__ n f r_m _v_r 1 0 0 g_v_r n m_n t s . T h_r_ _r_ _l s_ c_n c_r n s _t c__ l d _n c r__ s_ d r__ g h t s _n d _x t r_m_ w__ t h_r .

    Punctuate the text and add capitals

    scientists have come up with a revolutionary new idea to save planet earth from global warming geo engineers from harvard university believe that spraying sun dimming chemicals into the stratosphere high above the earth could slow down global warming they also say their technique would be remarkably inexpensive costing in the region of 225 billion a year over a 15year period the technique is known as stratospheric aerosol injection sai it is still in its infancy and is yet to be proven it would involve the use of gigantic hoses or high powered chemical cannons to spray chemicals into the stratosphere to act as a reflective barrier against sunlight and harmful uv rays

    the scientists have admitted that their idea is currently still in the planning stages they said we make no judgment about the desirability of sai we simply show that a hypothetical deployment program commencing 15 years hence while both highly uncertain and ambitious would indeed be technically possible from an engineering perspective not all scientists think the idea is a good one some think it is somewhat pie in the sky they say it would require a fleet of 100 specially designed planes to make 4000 missions a year crossing most of the globes airspace this would require permission from over 100 governments there are also concerns it could increase droughts and extreme weather.

    Put a slash (/) where the spaces are

    ScientistshavecomeupwitharevolutionarynewideatosaveplanetEart
    hfromglobalwarming.Geo-engineersfromHarvardUniversitybelieve
    thatspraying"sun-dimming"chemicalsintothestratospherehighabo
    vetheEarthcouldslowdownglobalwarming.Theyalsosaytheirtechniq
    uewouldbe"remarkablyinexpensive,"costingintheregionof$2.25billi
    onayearovera15-yearperiod.Thetechniqueisknownasstratospherica
    erosolinjection(SAI).Itisstillinitsinfancyandisyettobeproven.Itwoul
    dinvolvetheuseofgigantichosesorhigh-poweredchemicalcannonsto
    spraychemicalsintothestratospheretoactasareflectivebarrieragainst
    sunlightandharmfulUVrays.Thescientistshaveadmittedthattheiride
    aiscurrentlystillintheplanningstages.Theysaid:"Wemakenojudgme
    ntaboutthedesirabilityofSAI.Wesimplyshowthatahypotheticaldeplo
    ymentprogramcommencing15yearshence,whilebothhighlyuncertai
    nandambitious,wouldindeedbetechnicallypossiblefromanengineeri
    ngperspective."Notallscientiststhinktheideaisagoodone.Somethinki
    tissomewhatpieinthesky.Theysayitwouldrequireafleetof100speciall
    y-designedplanestomake4,000missionsayear,crossingmostoftheg
    lobe'sairspace.Thiswouldrequirepermissionfromover100governme
    nts.Therearealsoconcernsitcouldincreasedroughtsandextremeweat
    her.

    Free writing

    Write about sun dimming for 10 minutes. Comment on your partner’s paper.

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    Academic writing

    We will never be able to limit the effects of global warming. Discuss.

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    Homework

    1. VOCABULARY EXTENSION: Choose several of the words from the text. Use a dictionary or Google's search field (or another search engine) to build up more associations / collocations of each word.
    2. INTERNET: Search the Internet and find out more about this news story. Share what you discover with your partner(s) in the next lesson.
    3. GLOBAL WARMING: Make a poster about global warming. Show your work to your classmates in the next lesson. Did you all have similar things?
    4. SUN DIMMING: Write a magazine article about sun dimming. Include imaginary interviews with people who are for and against this.
    Read what you wrote to your classmates in the next lesson. Write down any new words and expressions you hear from your partner(s).
    5. WHAT HAPPENED NEXT? Write a newspaper article about the next stage in this news story. Read what you wrote to your classmates in the next lesson. Give each other feedback on your articles.
    6. LETTER: Write a letter to an expert on global warming. Ask him/her three questions about it. Give him/her three of your ideas on how to deal with global warming. Read your letter to your partner(s) in your next lesson. Your partner(s) will answer your questions.

    Answers

    (Please look at page 26 of the PDF to see a photocopiable example of this activity.)

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