Britain's Prime Minister Boris Johnson, left, and David Attenborough speak with school children during the launch of the upcoming UK-hosted COP26 UN Climate Summit in London, Tuesday Feb. 4, 2020, that will take place in autumn 2020 in Glasgow, Scotland. Johnson is expected to announce a target to stop selling new petrol and diesel vehicles by 2035, including hybrid vehicles for the first time. (Chris J Ratcliffe/Pool via AP)
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