Scientists research 'dimming sun' to fight climate change

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Scientists from Harvard and Yale suggest using solar geoengineering as a way to combat climate change.

Fleets of specially designed aircrafts would fly roughly 20 kilometers above ground in the lower stratosphere.

Once there the planes would spray tiny sulphate particulates to block sunlight in a process that is known as stratospheric aerosol injection.

According to their research, published in the journal Environmental Research Letters, this technique could cut the rate of global warming in half.

Researchers who participated in the study state it would be a 'remarkably inexpensive' process costing around $2 bn to $2.5 bn a year.

According to CNN, using this method would not lower greenhouse gas emissions and could also have negative consequences such as extreme shifts in weather and endangering crop yields.

RUNDOWN SHOWS:
1. Portrayal of plane flying in Earth's stratosphere
2. Depiction of plane spraying sulfate aerosol
3. Representation of sulfate aerosol blocking heat from sun
4. Depiction of consequences of stratospheric aerosol injection

VOICEOVER (in English):
"Fleets of specially designed aircrafts would fly roughly 20 kilometers above ground in the lower stratosphere."

"Once there, the planes would release tiny sulphate particulates, which would block sunlight in a process known as stratospheric aerosol injection."

"According to their study, published in the journal Environmental Research Letters, this technique could cut the rate of global warming in half."

"However, this method could also have negative consequences, such cause extreme shifts in weather and endanger crop yields. "


SOURCES:
Environmental Research Letters
http://iopscience.iop.org/article/10.1088/1748-9326/aae98d#erlaae98ds4