President Biden set a goal of reducing U.S. greenhouse gas emissions by half by 2030. His pledge to a virtual summit of world leaders in April is welcomed by those hit hardest by climate change and looking for as much quick action as possible.  VOA’s Arash Arabasadi has more.  Camera: AP/REUTERS/NASA/SKYPE/NATIONAL AUTONOMOUS UNIVERSITYProduced by: Arash Arabasadi 
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