Campaigners across the world took part in marches on Sunday to demand that global leaders take action to tackle climate change ahead of a critical UN summit in Paris.

Here's how people made a stand...

People in Rome march with a giant banner reading "We want a better world for everybody"

Climate change demonstrators march to demand curbs to carbon pollution in London

Masked man holds sign reading: "'Monsanto: this nightmare wants to sell your dreams" in Paris

Indian participants perform as they take part in a Global Climate Walk in New Delhi

Parisian protesters hold a giant marionnette behind a sign reading "You are not a puppet"

Two women wearing polar bear placards march during a rally calling for action on climate change in Hong Kong

A man holds a sign during a rally calling for action on climate change in Sydney

A cartoon character message left in a pair of shoes in Pars. It reads: "I march for the climate but... this is not for me. It is for the petrol lobby who dared not to show"

People hold hands to form a human chain during a gathering called by ecologist organisations in Marseilles

Climate change demonstrators march to demand curbs to carbon pollution in London

People gather at Piazza Campo di Fiori during a rally calling for action on climate change

A person dressed up as a panda bear takes part in the Global Climate March in Madrid

A protester dressed in reference to Star Wars holds stands in front of a sing reading "Defend climate and democracy, you must"

All pics: Getty

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