Extinction Rebellion DC dumps cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC brings pink wheel barrows full of cow manure to dump outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC carries pink wheel barrows full of cow manure to dump outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC blocks 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC dumps cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC blocks 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein

Extinction Rebellion DC dumps cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC holds a protest after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

The White Rebels and Extinction Rebellion DC protest outside the White House on Earth Day against President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Members of the White Rebels gesture towards cow manure that has been dumped outside the White House on Earth Day by the Extinction Rebellion in protest against President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC blocks 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

Members of the White Rebels gesture towards cow manure that has been dumped outside the White House on Earth Day by the Extinction Rebellion in protest against President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC dumps cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

The White Rebels demonstrate with Extinction Rebellion DC on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.

The White Rebels and Extinction Rebellion DC block 17th Street after dumping cow manure outside the White House on Earth Day to protest U.S. President Joe Biden's climate plan in Washington, U.S., April 22, 2021.

Members of the White Rebels gesture in front of cow manure that has been dumped outside the White House on Earth Day by the Extinction Rebellion in protest against President Biden's climate plan in Washington, U.S., April 22, 2021.

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden?s climate plan in Washington, U.S., April 22, 2021.

The White Rebels and Extinction Rebellion DC block 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021.