The most abundant gas in the atmosphere, making up 78 percent of it. Conversion of nitrogen to water-soluble forms such as ammonia and nitrates is called nitrogen fixation.

The United Nations body designated to coordinate all efforts in implementing policies and practices to safeguard the environment.

A chemical mixture used as a pesticide in the US from 1948 until its eventual ban in 1988. Some of its trade names are Octachlor and Velsicol 1068. Chlordane was once used on citrus and corn crops, on lawns and gardens as well as termites.

Air contaminants present inside homes and buildings. Many think that air pollution is only a problem outdoors, however, indoor air pollution is actually responsible for many human health problems.

Any substance that is found in an environment where it does not belong. The term also applies to any substance that can be found naturally in a given setting, but is present at levels higher than normal–enough to cause harm to living organisms.

Air pollution produced by transport vehicles such as cars, buses and trucks. Road vehicles are a major contributor to poor air quality, particularly in urban environments.

The balance between the energy of the sun coming into the earth and the earth’s own outgoing heat.

Ron and Lisa Beres wrote “Just Green It!” to steer consumers toward a greener, healthier lifestyle.

Do coat hangers lend themselves to high art? Artist David Mach proves that they will hook you.

In the study of air pollution, dispersion is a crucial factor as it is the movement and direction of where air contaminants are spread.

A type of fungal organism widely used as an environmental indicator or bioindicator due to its sensitivity to sulfur dioxide.

Asthma is a respiratory illness that disrupts the transport of air in and out of the lungs. The condition is genetic and triggered or aggravated by air pollution, both indoors and outdoors.