Global warning: 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.

Expanding:to increase in size, number, or importance, or to make something increase in this way

Deforestation: the cutting down of trees in a large area, or the destruction of forests by people.

Alternatives: An alternative plan or method is one that you can use if you do not want to use another one

Efffect.the result of a particular influence

Fossil fuel: fuels, such as gas, coal, and oil, that were formed underground from plant and animal remains millions of years ago

Deserts: an area, often covered with sand or rocks, where there is very little rain and not many plants

Flooding: A situation in which an area is covered with water, especially from rain

Untreated sawage: An untreated substance is not cleaned and has not had special substances added to protect it or make it safe to use

Country: An area of land that has its own government, army, etc.

Climate change: Changes in the world's weather, in particular the fact that it is believed to be getting warmer as a result of human activity increasing the level of carbon dioxide in the atmosphere.

Coastal flooding: a situation in which an area is covered with water, especially from rain

Air pollution: Harmful substances in the air, often consisting of waste from vehicles or industry.