air

Projects and experiments reveal the properties of air.

Presents a discussion of natural sources of air pollution and its effects on humans, plants, and animals, covering primary and secondary sources, monitoring by government agencies, and measures such as green roofs and the Clean Air Act, with commentary by experts and noteworthy case studies.

Discusses the many environmental problems, in alphabetical order, that are presently plaguing our air and atmosphere.

Learn about the air around you, and find out about oxygen, the atmosphere, gases, and pollution.

Focuses on the political and economic factors of air pollution.

Katara learns the truth about Aang's mysterious past, and Sokka reveals how he saved the Northern Air Temple from the Fire Nation.

Presents simple activities and experiments that demonstrate the properties of air by observing the presence of air and the pressure it exerts.