The protection of things found in nature.

Something that can be used for a purpose

To process in order to regain or reuse materials

When gases, smoke and chemicals are introduced into the environment in large doses that make it harmful for humans, animals and plants.

A rise of water with no place to go.

The variety of living things in a given place.

An organism that produces its own food.

Organisms that eat other living things

A living thing that feeds on and breaks down plant and animal matter.

A group of food chains within an ecosystem that shows a sequence of living things in which one organism eats the one below it.

The continuation of life