Sixteen-year-old Swedish climate activist Greta Thunberg, who gained notoriety after speaking in front of the United Nations Climate Action Summit and being mocked by President Donald Trump, is participating in a strike today in Denver.

Thunberg is also known for sailing across the Atlantic Ocean in a zero-emissions sailboat.

The teen is striking with activists from noon to 3 p.m. at Civic Center Park, 150 W. 14th Ave., at the Greek Amphitheater, according to an event invitation posted on The Action Network. Fridays For Future, International Indigenous Youth Council, Earth Guardians and 350 Colorado are organizing the event.

Organizers ask attendees to RSVP at actionnetwork.org/events/fridays-for-future-denver-strike-with-greta-thunberg. The event is free and open to the public.

Fridays For Future, a global movement, began after Thunberg, then 15, sat in front of the Swedish parliament every day for three weeks protesting a lack of action on climate change, according to its website. The movement spread on social media and students across the country began to plan their own strikes, including in Denver.