Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Need of Sustainable development : Economic activities bear an effect on environment. Therefore the protection of environment is necessary along with the fulfillment of the needs of the present population. Economic activities should be in harmony with the environment. The utilization of renewable resources should be done without reducing their previous levels. As the use of trees should be done with tree plantation. The utilization of nonrenewable resources should not be more than the equivalent quantity of alternative means. The burden of population should be in conformity to the availability of natural capital. Excessive population will have an adverse effect on our capability to fulfill the need of future generations.

The environment friendly sources of energy should be used, like wind energy, solar energy, gobar gas, and mini hydel plants and their development should be done rapidly because on one hand, the production of electricity from coal and petrol is decreasing their stable stock, and on the other hand, it is a cause of pollution. These poisonous materials enter our food through agricultural products and water.