Neuroscientist Shruti Muralidhar, front left, and microbiologist Abhishek Chari, front right, hold placards and chant during a demonstration by members of the scientific community, environmental advocates, and supporters, Sunday, Feb. 19, 2017, in Boston. The scientists at the event said they want President Donald Trump's administration to recognize evidence of climate change and take action on various environmental issues. (AP Photo/Steven Senne)
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