Hundreds of activists have been marching in the Mexican city of Cancun.
They're calling for international delegates at the UN climate change summit to take strong action.
The host city itself has witnessed rapid development amid a tourism boom but the rush to capitalise has been at the expense of the environment.
Cancun used to be a natural barrier island but its sand dunes and mangroves which are nature's buffers against the elements are now being decimated.
Al Jazeera's Craig Mauro reports from Cancun, Mexico.
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