It's totally not justified to cut trees just to fulfill our needs. Trees are known as ‘the lungs of the earth’. They are the habitat of many living organisms, including animals. They provide us oxygen, and play a key role in maintaining the O2-CO2 level in the atmosphere. Their roots firmly bind to the soil and hence prevents soil erosion. They also reduce the chances of natural disasters like floods and droughts. They help us to conserve our rich biodiversity.
Cutting of trees causes an increase in the carbon dioxide (CO2) level, which results in global warming. Moreover, it causes soil erosion, floods, the greenhouse effect, etc.
But if there is a serious need of clearing forests or cutting of a tree, then the agency or the company involved must take care of planting the same amount of trees with a deal of taking care of their nourishment and nutrients till they grow and become trees.