Any four major functions of environment preservation are:

1. Conservation of Forest.
2. Conservation of Land.
3. Management of water
4. Control of pollution.

1. Conservation of Forest: Forests are very important for us to survive and fulfill the basic needs. It is an important national economy. It is also the habitat of a number of living species. But these days the trend of deforestation is increased. It is a major problem in Nepal. Therefore, afforestation should be done on open land area. There should be a provision for controlling forest fires. We should adopt a man one tree policy. We can conserve forest through the community by forests. There should be strict checking in the forest area.