Biden announced the goal of reducing greenhouse gas emissions by 50% to 52% percent as he kicked off a climate summit with 40 other world leaders.

<p>Biden announced the goal of reducing greenhouse gas emissions by 50% to 52% percent as he kicked off a climate summit with 40 other world leaders.</p>

Get the latest news, sports, entertainment, money and tech stories from USA TODAY through your voice assistant.

<p>Get the latest news, sports, entertainment, money and tech stories from USA TODAY through your voice assistant.</p>

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