Air quality   

Air quality refers to the presence or absence of air pollution. The presence of substances such as particulates or acid gases (which cause acid rain), or toxins such as dioxin can harm the health of humans and other organisms. Air pollution from human sources has increased greatly in recent centuries; however air quality can also be influenced by the release of these substances from natural sources such as forest fires and volcanoes.

[edit] See also

• Air pollution
• Indoor air pollution
• Greenhouse gas emissions

This page is a "stub" - it needs more content. You are invited to add your knowledge. No registration needed - just edit. We monitor for spam and to keep these pages improving.