Aravali is the oldest mountain range in the geographical structure of India which is about 870 million years old.

1. Sikkim Which state of India has banned the use of chemical fertilizers for sustainable agriculture?

2. As a general philosophy, adopting sustainable agriculture means practicing agriculture without polluting the environment (soil, air, water), and without depleting any natural resources and destroying the ecosystem and biodiversity through your actions. Can produce adequate yield in a particular crop, without interruption.

1. The credit for initiating modern industrialization goes to coal energy resources.

2. Coal is a solid organic substance which is used as fuel. Coal is very important as a major source of energy. 35% to 40% of the total energy used comes from coal. Other combustible and useful substances are also obtained from coal.