all the members of a species living in a given area

the largest number of individuals of a given species that Earth's resources can support and maintain for a long period of time.

the removal of large areas of forests for human purposes.

the development of desert-like conditions due to human activities and/or climate change.

the development of land for houses or other buildings near a city

planting trees to replace trees that have been cut down or burned down.

process of restoring land disturbed by mining

pollution from a single source that can be identified

pollution from several widespread sources that cannot be traced back to a single source

result of nitrogen and carbon compounds reacting in sunlight.

rain or snow that has a lower pH than that of normal rainwater.

mix of both liquid and solid matter in the air

an increased concentration of carbon dioxide in the atmosphere can lead to

the natural process that occurs when certain gases in the atmosphere absorb and reradiate thermal energy from the sun

a scale that ranks levels of ozone and other air pollutants.