Tourists look at Argentina's Perito Moreno glacier near the city of El Calafate, in the Patagonian province of Santa Cruz December 15, 2009. Scientists warn that glaciers in the Andes, which limit Argentina with Chile are melting because of the effects of climate change. According to studies, these accumulations of ice are thawed at a pace so fast that it could disappear in 25 years.(Xinhua/Reuters Photo)