Greta Thunberg participates in a climate rally in Denver, Colorado (LIVE) | USA TODAY

Teen activist Greta Thunberg is participating in a climate rally in Denver, Colorado.

RELATED: Greta Thunberg speaks about climate strike https://www.youtube.com/watch?v=rLYXIeiMiiw

Greta Thunberg, who is nominated for the Nobel Peace Prize for her environmental activism, is in Denver to support the work of youth organizers leading local climate strike efforts.

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