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As little as two weeks ago, a centrepiece of US President Joe Biden’s climate agenda seemed to be dead in the water, because of opposition from members of Congress. But after a surprise turn of events, the US Senate is poised to approve the revived legislation — a massive spending bill that would make unprecedented investments in clean-energy innovation and deployment. Researchers say the legislation, if enacted, will reinvigorate efforts by the United States — and the world — to halt global warming.