2. To maintain a stable and balanced ecosystem. This prevents disruption of natural cycles such as water and carbon cycle and also prevents global warming.

3.To maintain a large gene pool. Many wild pants and animals possess favourable genes. By cross-breeding the different varieties of wild plants and animals, we can improve agricultural produce.

4. To ensure the conservation of marine life as they are a major source of human food.

A giant group (picture from wikipedia)

5. Conservation of scientific value. The study of wildlife provides useful information to humans.

6. Conservation preserves natural scenery and wildlife for people to appreciate. It also maintains natural resources for outdoor recreational activities such as hiking and fishing.

natural scenery (picture from yahoo)

7. To maintain biodiversity. Especially rainforests as it's a house to many species of animals and plants. Many rainforests are also of great economic importance as they are source of raw materials for industries.

- Tropical rainforests provide raw materials for industries. For example, rubber from the latex of rubber trees is used to make tyres.

-Tropical plants provide raw materials for medicinal drugs and natural insecticides. For example, quinine, anti anti-malarial drug from the bark of Cinchona.

-Tropical rainforests provide food. For example rice, pineapple and banana are food plants that were developed from rainforest plants.

rainforest in the blue mountains, australia (picture from Earth encyclopedia)