Participants in the Peoples Climate March say they're objecting to Trump's rollback of restrictions on mining, oil drilling and greenhouse gas emissions at coal-fired power plants, among other things.
In Washington, D.C., large crowds on Saturday were making their way down Pennsylvania Avenue, where they planned to encircle the White House. Organizers say about 300 protest marches are taking place around the country, and dozens more in Canada and overseas.
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