Give reason:
Waste is a valuable resources,if managed properly.

Give reason of inert gases

Give examples of natural resources.

Give reasons Rearing of sheep is a livestock’.

Give reasons for : Carbon is a tetravalent in nature.

Give scientific reasons : Water is life.

Give scientific reasons: Water is a compound

Give reasons: Oxygen is necessary for life.

Give reasons: Beans and pulses are rich in proteins.

Paragraph based question: Read the following paragraph and answer the question based on it. Many waste materials are generated through the various daily human activities. This is called solid waste. If these waste materials are properly disposed of, they can be valuable source of energy. Currently, solid waste is a serious world wide problem as it causes both water and soil pollution. Solid waste is also serious problme from the point of view of economic growth, environment degradation and health. It has posed a serious threat to nature and human habitat because of the air, water and soil pollution it causes. Solid waste generated in the main metro cities of the state is approximately as follows-Mumbai: 500 tons, Pune: 1700 tons, Nagpur : 900 tons. When can be the wastes become valuable source of energy?