Sunday was far and away the biggest day of climate action the planet has ever seen — one day before world leaders descended on Paris for the landmark U.N. Climate Summit.

There was no major climate march in Paris — it had been called off in the wake of the recent terrorist attacks in the city, replaced by more quiet actions — but activists in other places around the world more than made up for it. Hundreds of thousands of people joined an estimated 2,300 marches and actions in 175 countries over the weekend, demanding that the heads of state and negotiators in Paris pull together a strong deal to fight global warming — and fight to keep fossil fuels in the ground and shift to 100 percent clean energy.

Suva, Fiji:

Fiji march

Tom Vierus / 350.org

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Aukland, New Zealand:

Melbourne, Australia:

Melbourne activists

Peter Campbell / 350.org

Tokyo, Japan:

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Seoul, South Korea:

Dhaka, Bangladesh:

Kiev, Ukraine:

Kiev march

Reuters / Valentyn Ogirenko

Helsinki, Finland:

Helsinki

Reuters / Vesa Moilanen / Lehtikuva

Johannesburg, South Africa:

Berlin, Germany:

Berlin march

Pursche / Grodotzki / Neugebauer / Campact

Stockholm, Sweden:

Stockholm protest

REUTERS/Christine Olsson/TT News Agency

Copenhagen, Denmark:

Copenhagen march

Brian Berg / 350.org

Oslo, Norway:

Oslo protest

Monica Lovdahl / 350.org

London, England:

Rio de Janeiro, Brazil:

Rio protest

Reuters / Pilar Olivares

Bogota, Colombia:

Bogota protest

Reuters / Jose Miguel Gomez

Washington, D.C.:

Jay Mallin

New York City, New York:

NYC march

Reuters / Eduardo Munoz

Ottawa, Canada:

Sayulita, Mexico:

Oakland, California:

Cliffs of Moher, Ireland: