El Día Internacional de la Tierra

A boy crosses a water fountain behind a banner dedicated to the earth in the famework of "Global Earth Day" at the Revolution monument in Mexico City on April 21, 2013. AFP PHOTO/ Yuri CORTEZ

US Ambassador to Sri Lanka, Michele Sison, looks for rubbish along the coast of Colombo on April 22, 2013, on World Earth Day. Some one billion people in approximately 192 countries are reportedly taking action to protect the environment on earth day for which the theme thie year is 'The Face of Climate Change". AFP PHOTO/Ishara S. KODIKARA

Indian activists from The People for the Ethical Treatment of Animals (PETA) pose wearing green body paint holding placards during a demonstration in Hyderabad on April 22, 2013, on World Earth Day. PETA exhorts the world to switch to an earth-friendly vegan diet on the occasion of Earth Day. AFP PHOTO/Noah SEELAM

An Indian ragpicker walks among heaps of rubbish at a municipal waste dump in Dimapur on April 22, 2013, on World Earth Day. Earth Day is observed each April 22, during which events are held worldwide to demonstrate support for environmental protection. AFP PHOTO/STR

An Indian youth dressed as a tree looks on during an awareness event commemorating Earth Day in Allahabad on April 22, 2013. Environmental groups are pushing for stronger forest and wildlife protection and conservation as April 22, 2013 marks World Earth Day. AFP PHOTO/ SANJAY KANOJIA

Indonesian demonstrators carry an effigy of the earth as they parade in a rally in Surabaya in Indonesia's eastern Java island to mark the World Earth Day on April 22, 2013. Environmental groups are pushing for stronger forest and wildlife protection and conservation as April 22, 2013 marks Wold Earth Day. AFP PHOTO / JUNI KRISWANTO

An Indian child paints during an awareness event organised by the Aakalpan Artist Society commemorating Earth Day in Allahabad on April 22, 2013. Environmental groups are pushing for stronger forest and wildlife protection and conservation as April 22, 2013 marks World Earth Day. AFP PHOTO/ SANJAY KANOJIA

An Indian youth dressed as a tree looks on during an awareness event commemorating Earth Day in Allahabad on April 22, 2013. Environmental groups are pushing for stronger forest and wildlife protection and conservation as April 22, 2013 marks World Earth Day. AFP PHOTO/ SANJAY KANOJIA