USA, Colorado, Sign on a mountain top near Aspen.

Papua New Guinea, Environment, Deforestation of hillside for agricultural use. Aerial view over terraces and surrounding forest.

Azerbijan, Polluted wasteland with nodding donkey of oil field near Baku.

Mexico, Gulf Coast, Cuidad del Carmen, Cattle grazing on deforested land.

Eritrea, Barentu, Area of deforestation.

Environment, Air, Pollution, City skyline with heavy smog in Santiago, Chile.

Environment, Pollution, Factory omitting plumes of smoke from chimneys in Santiago, Chile.

Indonesia, Borneo, Deforestation, Area cleared by logging industry.

Greece, Central, Athens, Cityscape and smog.

Sri Lanka, Colombo, Egrets and jackdaws in shallow polluted river.

India, Uttar Pradesh, Varanasi, Scum and remnants of flower offerings float around the steps of the ghats on the River Ganges.

Russia, Black Sea, Aerial view over polluted waters.