Thousands March Against Trump Administration Policies on Climate Change

Participants walk along Pennsylvania Ave., in front of the White House in Washington, during a demonstration and march, April 29, 2017. Thousands of people gather across the country to march in protest of President Donald Trump's environmental policies, which have included rolling back restrictions on mining, oil drilling and greenhouse gas emissions at coal-fired power plants.

Demonstrators sit on the ground along Pennsylvania Ave. in front of the White House in Washington during a demonstration and march, April 29, 2017.

Dori Mann takes a snapshot of friends and family posing with a snowman draped with an anti-Trump sign as they all participated in a climate change awareness march and rally, in Denver, April 29, 2017.

President Donald Trump supporters hold a counter rally during "100 Days of Failure" protest and march in New York, April 29, 2017.

A demonstrator holds a sign during "100 Days of Failure" protest and march in Chicago, April 29, 2017. Thousands of people across the U.S. are marking President Donald Trump's hundredth day in office by marching in protest of his environmental policies.

People pause during a demonstration and march on Market Street in Philadelphia, April 29, 2017. Thousands of people gathered across the country to march in protest of President Donald Trump's environmental policies, which have included rolling back restrictions on mining, oil drilling and greenhouse gas emissions at coal-fired power plants.

A pair of participants chant in front of the White House in Washington, April 29, 2017, during a demonstration and march. Thousands of people gathered across the country to march in protest of President Donald Trump's environmental policies, which have included rolling back restrictions on mining, oil drilling and greenhouse gas emissions at coal-fired power plants.

Demonstrators march on the State Street during "100 Days of Failure" protest and march in Chicago, April 29, 2016. Thousands of people across the U.S. are marking President Donald Trump's hundredth day in office by marching in protest of his environmental policies.