The world is warming, this much we know. But exactly how much it will warm in the coming decades, and the exact effects that warming will have is still uncertain.
Equally as uncertain is humanity's ability and desire to undo what we have done.
Lately, efforts to stop the warming, or at least slow it down by reducing the amount of greenhouse gases pumped into the atmosphere are stalling, and so attention from everyone from climate scientists to Bill Gates has increasingly turned toward developing ways to counteract the effects of global warming, with the worry that it might already be too late to stop them.
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