Finding ways of safely burying carbon dioxide could be the only way of keeping greenhouse gas emissions below dangerous levels, the International Energy Agency's chief economist said on Thursday.
Carbon capture and storage (CCS) is seen by industry and some lawmakers as a possible silver bullet in the fight against climate change as it could curb growing emissions from coal plants.
But it has never been tested on a commercial scale and it is strongly opposed by some environmentalists, who argue it is unsafe, will not be ready in time and could divert investment away from truly green sources of power.
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