The process of cutting down the trees of a forest.

A rise in the level of the world's oceans due to the effects of global warming

Melting of the thick sheets of ice near Antarctica and in the Arctic Ocean near the North Pole

the process of making the environment dirty or harmful

a long period with little or no rain

the presence in or introduction into the air of a substance which has harmful or poisonous effects

an increase in the world's temperatures, which many scientists believe is caused in part by the greenhouse effect

a fire, especially in natural surroundings, that burns rapidly and uncontrollably over a large area

the release of substances into bodies of water that makes water unsafe for human use and disrupts aquatic ecosystems

mining activity that is undertaken without state permission, in particular in absence of land rights, mining licenses, and exploration or mineral transportation permits