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WASHINGTON, DC - MARCH 28: US President Donald Trump looks for US Secretary of the Interior Ryan Zinke after signing an Energy Independence Executive Order at the Environmental Protection Agency (EPA) Headquarters on March 28, 2017 in Washington, DC. The order reverses the Obama-era climate change policies. (Photo by Ron Sach-Pool/Getty Images)

WASHINGTON, DC - MARCH 28:   US President Donald Trump looks for US Secretary of the Interior Ryan Zinke after signing an Energy Independence Executive Order at the Environmental Protection Agency (EPA) Headquarters on March 28, 2017 in Washington, DC. The order reverses the Obama-era climate change policies.  (Photo by Ron Sach-Pool/Getty Images)