10/14/2010 11:31 am ET Updated May 25, 2011

Paris, Mexico City, Amsterdam, Zagreb Pledge To Cut Carbon Emissions 10% In Next Year For 10:10 Campaign

Mexico City's taxis and Paris's city halls are about to become greener after four worldwide capitals signed up to the 10:10 climate campaign.

The mayors of Amsterdam, Zagreb, Paris and Mexico City announced this week that they intend to cut their cities' carbon emissions by 10% in the next year.

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