Global climate change
The long-term changes in temperature, moisture, and air mass movements occurring globally as a result of changes in the earth.

Glacier
A flowing body of ice, formed in a region where snowfall exceeds melting.

Geosphere
The solid land portion of the Earth as opposed to the atmosphere and the hydrosphere. Also called lithosphere.

Fuelwood
Branches, logs, and other tree parts that have been harvested or removed for use as fuel for cooking, heating, or producing power.

Forest type
A group of tree species that commonly grow in the same stand because their environmental requirements (for a certain soil type, climate, etc.) are similar.

Evidence
Information used to support or counter a theory or hypothesis. Scientific evidence is gathered from observation or experimentation.

Elevation
The height of a place above sea level or ground level.

El Niño
A warm-water current that periodically flows along the coast of Ecuador and Peru, altering weather patterns over much of the Earth.

Ecologist
A person who studies the interrelationship of organisms and their environments.

This is just a plain old Glossary item.