The materials wich are supplied by the earth, that is, by nature, are called natural resources. Some natural resources can by used again and again. They are called renewable resources. Other natural resources can be used only once. They are called...

Orangutan means 'forest man' a very suitable name for the largest of the tree dwelling apes, a large male can weigh 90 kg. Orangutans live in Andalas island and Borneo island, in Indonesia and Malaysia. They are very gentle animals and live...

Tornado is one of the world's climate changes. There are many others.The number of storms is increasing and there are more huricanes.There are more floods in some parts of the world, and there's much less rain in others. We know that these happen...

Air pollution is caused by gas which is issued by the industry, motor vehicles and housing. All gas is results of burning fossil (oil, coal) and the use of dangerous gas, eg CFC gas.A. Gas combustion resultsFrom out of gas, produce CO and sulfur...

Rain forerts cover about 10% of the earth, but they contain 90% of the world's animals and plants. Rain forests are found in the hottest parts of the earth. They are situated in the area from the Tropic of Cancer to the Tropic of Capricorn. This is...