An unwanted substance added to the water, air, or soil.

A natural activity that builds new features on Earth's surface.

Garbage that people throw onto the ground.

Resources that can be replaced.

An area where two plates move past each other in opposite direction

A place where garbage is buried under the ground.

A resource that can't be replaced or can't be replaced as fast as people use it.

A crack in Earth's lithosphere where two plates meet.