The Reading / Listening - Sun Dimming - Level 5

Scientists have a revolutionary idea to save Earth from global warming. Geo-engineers from Harvard University believe that spraying "sun-dimming" chemicals high above the Earth could slow down global warming. They say this would be "remarkably inexpensive," costing about $2.25 billion a year over 15 years. The technique is called stratospheric aerosol injection (SAI). It is still yet to be proven. It would involve using huge hoses or high-powered cannons to spray chemicals into the stratosphere. This would be a reflective barrier against sunlight.



The scientists admitted that their idea is still in the planning stages. They said: "We make no judgment about the desirability of SAI. We simply show that a hypothetical deployment program, while both highly uncertain and ambitious, would indeed be technically possible." Not all scientists think the idea is a good one. Some think it is pie in the sky. They say 100 specially-designed planes would need to make 4,000 missions a year, crossing most of the globe's airspace. Over 100 governments would need to agree to this. There are concerns it could increase droughts and extreme weather.

Try the same news story at these levels:

    Sun Dimming - Level 4 or  Sun Dimming - Level 6

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 :-)



Phrase Matching

Paragraph 1

  1. spraying "sun-dimming"
  2. high above
  3. slow down
  4. be remarkably
  5. It is still yet to
  6. It would involve using huge
  7. spray chemicals into
  8. a reflective barrier
  1. global warming
  2. the stratosphere
  3. be proven
  4. against sunlight
  5. chemicals
  6. inexpensive
  7. the Earth
  8. hoses

Paragraph 2

  1. their idea is still in the
  2. Some think it is pie
  3. 100 specially-
  4. make 4,000
  5. crossing most of the globe's
  6. Over 100 governments would need
  7. it could increase
  8. extreme
  1. missions a year
  2. droughts
  3. airspace
  4. in the sky
  5. weather
  6. planning stages
  7. designed planes
  8. to agree to this

Listening — Listen and fill in the gaps

Scientists have a revolutionary (1) ___________________ Earth from global warming. Geo-engineers from Harvard University (2) ___________________ "sun-dimming" chemicals (3) ___________________ Earth could slow down global warming. They say this would be "remarkably inexpensive," costing about $2.25 billion (4) ___________________ 15 years. The technique is called stratospheric aerosol injection (SAI). It (5) ___________________ to be proven. It would involve using huge hoses or high-powered cannons to spray chemicals into the stratosphere. This would be (6) ___________________ against sunlight.

The scientists admitted that their idea is still in (7) ___________________. They said: "We make no judgment about (8) ___________________ SAI. We simply show that a hypothetical deployment program, while both highly uncertain and ambitious, would (9) ___________________ possible." Not all scientists think the idea is a good one. Some think it (10) ___________________ the sky. They say 100 specially-designed planes would need to make 4,000 (11) ___________________, crossing most of the globe's airspace. Over 100 governments would need to agree to this. There are concerns it could increase droughts (12) ___________________.

Put a slash (/) where the spaces are

ScientistshavearevolutionaryideatosaveEarthfromglobalwarming.G
eo-engineersfromHarvardUniversitybelievethatspraying"sun-dimm
ing"chemicalshighabovetheEarthcouldslowdownglobalwarming.Th
eysaythiswouldbe"remarkablyinexpensive,"costingabout$2.25billi
onayearover15years.Thetechniqueiscalledstratosphericaerosolinje
ction(SAI).Itisstillyettobeproven.Itwouldinvolveusinghugehosesor
high-poweredcannonstospraychemicalsintothestratosphere.Thisw
ouldbeareflectivebarrieragainstsunlight.Thescientistsadmittedthatt
heirideaisstillintheplanningstages.Theysaid:"Wemakenojudgmenta
boutthedesirabilityofSAI.Wesimplyshowthatahypotheticaldeploym
entprogram,whilebothhighlyuncertainandambitious,wouldindeedb
etechnicallypossible."Notallscientiststhinktheideaisagoodone.Som
ethinkitispieinthesky.Theysay100specially-designedplaneswouldn
eedtomake4,000missionsayear,crossingmostoftheglobe'sairspace.
Over100governmentswouldneedtoagreetothis.Thereareconcernsit
couldincreasedroughtsandextremeweather.

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 — Write your own questions

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

(a) ________________

(b) ________________

(c) ________________

(d) ________________

(e) ________________

(f) ________________

(g) ________________

(h) ________________

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

(i) ________________

(j) ________________

(k) ________________

(l) ________________

(m) ________________

(n) ________________

(o) ________________

(p) ________________





Free writing

Write about this topic for 10 minutes. Comment on your partner’s paper.

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Answers

(Please check your answers against the article above.

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