The 350.org climate change worldwide protest

Sydney, Australia: Participants form the numerals '350' at the Sydney Opera House Photograph: Tim Cole/EPA

Brandenburg Gate, Berlin: Three hundred and fifty people wearing Angela Merkel masks take part in an event called Looking For a Climate Chancellor Photograph: Caroline Pankert/AFP/Getty Images

Brooklyn, New York: Polar explorer Robert Swan speaks to activists at a protest along the waterfront in New York. America remains the heart of the CO2 emissions problem Photograph: Michael Nagle/AP

Budapest, Hungary: People participate in the Climate Bath, a demonstration in an open-air pool at the Szechenyi Thermal Baths Photograph: Balazs Mohai/EPA

London, England: Led by 350 ambassador Bianca Jagger, participants form a human figure '5' in Jubilee Gardens on London's South Bank. In other locations, protested formed the figures '3' and '0'. "It's a kind of planet-scale Scrabble – it'll take the BBC and CNN and the rest to solve the puzzle, to make the point that you have to work across borders to solve these problems," said 350.org co-founder Bill McKibben Photograph: John Stillwell/PA

Copenhagen, Denmark: Hundreds gather at City Hall Square. Andrew Simms, head of climate change at the New Economic Foundation, said: "Like the safe load-line on a boat, the global economy has an environmental water line created by climate change. We're already crossing it, raising the risk of sinking. But instead of lightening the load to get back to safe levels, we're still piling more stuff on board" Photograph: Jasper Carlberg/EPA

A human chain forms the 350 logo along the Jordanian (left), West Bank (centre) and Israeli (right) shores of the Dead Sea Photograph: AFP/Getty Images

Hanoi, Vietnam: Students in the Vietnamese capital join in one of the approximately 4,600 campaign events worldwide Photograph: Chitose Suzuki/AP

Mumbai, India: Residents of Dharavi, Asia's largest slum, were just as vocal Photograph: Rafiq Maqbool/AP

Istanbul, Turkey: A large "Earth ball" bears the figure 350 Photograph: Mustafa Ozer/AFP/Getty Images

Kiev, Ukraine: Residents dressed as animals, TV characters and other figures parade through the city Photograph: Sergey Dolzhenko/EPA

Boston, Massachusetts: A gathering at the harbour, near the site of the historic Boston Tea Party protest Photograph: Adam Hunger/AP

Marseille, France: A citywide protest swept across France's third-largest city Photograph: Patrick Valasseris/AFP/Getty Images

Ottawa, Canada: Protesters brave the rain on Parliament Hill. Canada's tar sands oil extraction project in Alberta has been called "a deadly threat to the planet" Photograph: Pawel Dwulit/AP

Srinagar, Kashmir: Shikara boats in formation on Dal Lake. There were more than 150 coordinated events across India Photograph: Rouf Bhat/AFP/Getty Images

Taipei, Taiwan: Locals join in the protest. Across the strait, there were as many as 300 big rallies in China Photograph: Chiang Ying-ying/AP