MEXICO CITY, June 5 (Xinhua) -- Mexican President Felipe Calderon said on Friday that the biggest threat for human beings is climate change, which could lead to damages in Mexico equal to 6 percent of its gross domestic product (GDP).

    Attending the official ceremony marking the World Environment Day in the eco-tourist park XCaret in Quintana Roo, Calderon said that climate change was also "an opportunity to change the course."

    The estimated damage figures, according to a study on the economic impact of climate change in Mexico by the National Autonomous University of Mexico, were "very conservative," Calderon said.

    The event was attended by more than 400 experts, activists and representatives of different environmental and governmental organizations from different countries.

    It was the moment to think of the risks of the environment deterioration and to take measures to revert it, Calderon said.

    The president said that during his term, some 700,000 hectares of forests had been recovered and the plan now was to reforest some 200,000 hectares per year.

    Mexico was launching a special program to reduce carbon emissions of some 50 million tons, with measures taken by the automotive sector and the construction of green buildings, he said.

Special Report: Fight against Global Warming