Greenpeace volunteers in Buenos Aires take part in an event with a banner reading: 'Energias 100% Renovables el 2050' (100% Renewables By 2050).

From the waters of the Arctic to the beaches of Indonesia, thousands are taking part in a Global Day of Action to demand the phasing out of fossil fuels and nuclear energy, and the transition to 100% renewables.
The Global Day of Action, under the banner of Actions for Climate, is supported by more than 100 environmental groups across the world, including Coalition Climat 21, CAN, 350.org and Avaaz. It is part of several days of activities inspired by the UN summit on the Sustainable Development Goals, one of which is the need to protect the planet from catastrophic climate change.