- Natural Disasters:
Rain which contains large amounts of harmful chemicals as a result of burning substances such as coal and oil.
-Drought:
A long period when there is little or no rain.
-Flood:
A large amount of water covering an area that is usually dry.
-Earthquake:
A sudden violent movement of the Earth's surface, sometimes causing great damage.
-Global Warming:
A gradual increase in world temperatures caused by polluting gases such as carbon dioxide which are collecting in the air around the Earth and preventing heat escaping into space.
-Greenhouse Effect:
An increase in the amount of carbon dioxide and other gases in the atmosphere which is believed to be the cause of a gradual warming of the surface of the Earth.
-Oil Slick:
A layer of oil that is floating over a large area of the surface of the sea, usually because an accident has caused it to escape from a ship or container.
-Ozone Layer:
A layer of air high above the Earth, which contains a lot of ozone, and which prevents harmful ultraviolet light from the sun from reaching the Earth.
Scientists believe that there is a hole in the ozone layer.
-Pollution:
Damage caused to water, air.... by harmful substances or waste.
-Tsunami:
An extremely large wave caused by movement of the earth under the sea, often caused by an earthquake.