Climate Change conference ends in Bolivia

The "World People's Conference on Climate Change and Rights of Mother Earth" has ended in Bolivia.

Delegates have called for a 50 percent reduction greenhouse gas emissions by 2020, as a park in the Andes suffers what some experts say are the effects of global warming.

The Bolivian Sajama national park sits high in the Andes close to the Chilean border.

Melting snow from the towering Sajama mountain feeds highland marshes, which in turn nourish grasses where alpaca and llama graze.

But now, Sajama's white peak is shrinking.

Venezuela's President Hugo Chavez (L), Bolivia's Foreign Minister David Choquehuanca (C) and President Evo Morales (R) participate in the World People's Conference on Climate Change and the Rights of Mother Earth in Tiquipaya on the outskirts of Cochabamba April 22, 2010. REUTERS/Gaston Brito