●A £2.3million experiment
partly-funded by Bill Gates hopes to block sun rays ●Harvard University
scientists will spray tiny chalk particles into the atmosphere ●This could have similar
effect to an erupting volcano's sulphur dioxide emission
Scientists are to copy
the effects of a massive volcanic eruption to block the Sun’s rays and
combat global warming.
Daily
Mail UK report continues:
As
part of a £2.3million (US$3million) experiment partly-funded by Microsoft’s Bill
Gates, a team from Harvard University will spray tiny chalk particles into the
atmosphere 12 miles above the Earth to reflect some of the Sun’s rays back into
space.
They
hope this will have a similar effect to an erupting volcano releasing sulphur
dioxide. In 1991, Mount Pinatubo erupted in the Philippines, releasing
20million tons of sulphur dioxide. That cooled the planet by 0.5C for 18
months.
The
goal is to reduce the worst effects of climate change in the hope that this
could save coral reefs and polar ice sheets.
The
team hopes to launch a steerable balloon over the southwest United States
before next July. It will release jets of calcium carbonate: chalk dust.
Scientists will measure how this affects the Sun’s light.
Opponents
say spraying particles in such a way might damage the ozone layer and disrupt
rainfall patterns, which could cause drought in some areas, according to The
Times.
And they say such geo-engineering diverts attention from cutting greenhouse gas emissions.
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