Question

why do we need to conserve forest

Answer 1

Forests are the 'lungs ' of the earth because they supply oxygen to the atmosphere. 
they are rich in flora & fauna & form the home of rare species of plants & animals. 
Trees and forests have always been a life support system, not only for humans, but also for wild and domesticated plants and animals. Trees and forests protect the land from erosion. They protect homes, farms, and coastlines from strong winds and waves. They make soils fertile, keep air, streams and lagoons clean and clear, and provide habitats and food for animals. Trees also provide us with food and countless other products that would either be too expensive to buy or impossible to import from overseas. 

forests give us 5 'f's, in the form of food, furniture, fibre, fertiliser,& .fuel 
food--in the form of fruits, nuts, animals & also medicine. 
Forests supply the raw materials for the lumber, plywood, paper, packaging and other wood-based materials that are staples of modern life 
forests are sources of clothes, resins(,rubber, gum ) 
the animals & plant wastes form natural fertilizers, 
the trees help in absorbing CO2,& replenishing O2.thus purifying the atmosphere, & reducing pollution. 
the trees check soil erosion, bring in rains, help to conserve ground water 
Due to population boom, there is an increase demand for many of the commodities. This has led to deforestation;, forests have shrunk to give space for agricultural lands, construction of factories& houses. 
Animals, birds are becoming extinct due to loss of shelter &vegetation 
fertile lands are becoming barren due to scarcity of water & erosion of top soil; 
Excessive floods & forest fires also destroy forests. 
this has led to an increase in temperature which is now referred to as global warming. 
So it is essential preserve forests by reducing cutting of trees help in afforestation programs ,finding alternative sources for forest products, reducing wastage ,recycling & reusing processes 
for the entire list of uses of trees in the forests
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Answer 2

We need to conserve our forests for the following reasons:

•forests ensures a very rich biodiversity on earth. Loss of biodiversity leads to loss of ecological imbalance.

•forests provide raw materials for industries.

•forests provide shelter for animal habitat.

•forests takes carbon dioxide. So that there will be balance of carbon dioxide in nature.

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