Things such as minerals, forests, coal, etc. that exist in a place and can be used by people

Not harmful to the environment

Relating to products, systems, etc. that use as little electricity, gas, etc. as possible

The process of getting rid of large amounts of rubbish by burying it, or a place where rubbish is buried

Substances that are used in or produced by a reaction involving changes to atoms or molecules and are harmful for health.

It is a mixture of solid particles and gases in the air.

A long period when there is little or no rain

Able to decay naturally and in a way that is not harmful

The amount used the vital liquid.

A gradual increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the earth and stopping heat escaping into space