- Forests are the green lungs and water purifying systems in nature.

Fig. Forest
- Forests look green because tree tops form a green cover over the land in the forest.
- Environment of forest is peaceful and cool breeze blows.
- Forest is a habitat of many plants and animals.

Fig. Plants and animal in the forest
- Forests pump oxygen which we breathe in and keep the earth cool by absorbing carbon dioxide, a major element of global warming.