Can we ever draw enough carbon out of the atmosphere to stop climate change?

Nature has equipped Earth with some giant “sponges” or carbon sinks that can help humans to fight climate change. These natural sponges, as well as man-made ones, can sop up carbon, effectively removing it from the atmosphere.

But what does this sci-fi-like act really entail? And how much it will take – and cost – to make a difference and slow Climate change?

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