Gap Fill - Sun Dimming - Level 4


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   ambitious      chemicals      engineers      extreme      governments      high      hoses      huge      hypothetical      missions      new      pie      planning      remarkably      scientists      simply      stratospheric      sunlight      technically      technique  
Scientists have a idea to save Earth from global warming. Geo- believe that spraying "sun-dimming" chemicals above the Earth could slow down global warming. They say this would be " inexpensive," costing about $2.25 billion. The is called aerosol injection (SAI). It would need , high-powered to spray into the stratosphere. This would be a barrier against .

The said their idea is still in the stages. They said: "We show that a deployment program, while both highly uncertain and , would indeed be possible." Some scientists think the idea is in the sky. They say special planes would need to make 4,000 a year across the globe's airspace. Over 100 would need to agree to this. It could increase droughts and weather.

Try the Sun Dimming - Level 5 gap fill.

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