THE ALMIGHTY BILL GATES

Could dimming the sun help to cool the Earth? Bill Gates wants to spray millions of tonnes of CHALK into the stratosphere to reflect sunlight and slow global warming – but critics fear it could be disastrous
The project will see a test balloon launch this summer from the town of Kiruna
It will send 2kg of chalk into the stratosphere 12 miles above the Earth’s surface
Scientists will then monitor who the dust particles interact with the atmosphere
This will be fed into computer models to predict how a larger plume would work
The idea is to ‘block out’ some of the sun’s energy to cool down the Earth