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Hello, this is Six Minute English from BBC Learning English.
I'm Neil.
And I'm Sam.
It's hard to feel positive when you hear about climate change, don't you think, Neil?
Yes.
According to the UN's COP26 conference,
we're heading for a catastrophic global temperature rise of three degrees by the end of this century.
Fires are blazing from the Amazon to the Arctic, and even if we stopped burning all fossil fuels tomorrow, it would take decades to feel the effects.
It's all very depressing.
I agree, but there is hope that catastrophes can be avoided thanks to some amazing ideas by some very imaginative scientists.
In this programme we'll be discussing geoengineering,
the name for a collection of new scientific plans to remove carbon from the atmosphere and stop global warming.
Also called climate repair, geoengineering is still in the experimental stages.
Some technologies are controversial because they interfere with natural climate systems,
and others may not even be possible.
One ingenious idea to call the planet involves spraying diamond dust in the sky to deflect the sun's rays.
Amazing.
But before we find out more, I have a question for you, Sam.