The study of living organisms and systems. Biology began as a science that observes the natural world.

Light produced by living organisms through a chemical reaction and the process of emitting biologically-produced light.

The partially decomposed remains of plants which accumulate and are preserved in waterlogged conditions in areas of cool, humid climate.

The process in which growing human populations build and inhabit cities or suburbs. Historically, it has been closely connected with industrialization.

Thinking of upping the chic in your pool this summer? You have plenty of choices when it comes to recycled tile or flooring.

A living organism that appears in a given environment because of man-made conditions such as air or water pollution.

One or a few species that are most numerous in a specific natural environment. Dominant species are usually plant life that reflect the characteristics of a given area–soil type, water type, climactic conditions, etc.

Living organisms whose addition or loss from an ecosystem can lead to significant changes in the abundance of other species in that environment.

Short for biological indicator, a bioindicator is an organism that is monitored to asses the health of a natural environment or ecosystem.

Biological integrity refers to how healthy an environment is relative to its original state as an ecosystem–before it was altered by human activity.

Specific information that are used to describe the conditions of a given ecosystem — specifically how human activity affects its natural environment.

1-800-RECYCLING’s new iPhone app makes recycling easier than ever.