Some wore black dresses to signify a funeral for fossil fuels. Hundreds wore red shirts, symbolising the blood of colleagues fighting to protect the environment. And others chanted, waved huge flags or held up signs. Saturday is what's traditionally the biggest day of protest at the halfway point of annual United Nations climate talks.

Organisers with booming sound systems on trucks with raised platforms directed protesters from a wide range of environmental and social movements. Marisol Garcia, a Kichwa woman from Peru marching at the head of one group, said protesters are there to put pressure on world leaders to make “more humanised decisions”.

The demonstrators planned to walk about 4 kilometres (about 2.5 miles) on a route that would take them near the main venue for the talks, know

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