Around the world, ambitious projects are testing everything from seeding clouds with chemicals to pouring artificial whale excrement into the sea.The goal is to remove CO2 from the atmosphere via so called 'geoengineering' and 'carbon capture' processes - and help to mitigate .Geoengineering sees heat from the sun reflected back into space to limit climate change, while 'carbon capture' captures CO2 from the air, either directly or by capturing it in rain among other techniques.
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