Name an energy source that can be used for sustainable development.

The energy source that can be used for sustainable development are renewable energy sources such as wind, hydroelectric power, solar, and geothermal energy are generally far more sustainable than fossil fuel sources.

Name a gas present in the air, the increase in the amount of which causes global warming.

Carbon dioxide CO 2 is a gas present in the air, the increase in the amount of that causes global warming. It is the main cause of global warming. The greenhouse gases like carbon dioxide trap the solar radiation from the sun.

What is the role of NO in decomposition of ozone in the ozone layer?

Nitric oxide NO reacts with the ozone to form oxygen and nitrogen dioxide. The ozone then breaks down to atomic oxygen by absorbing UV-rays. Nitrogen dioxide reacts with atomic oxygen and forms NO back. Hence, the NO continuously destroys the ozone layer.

What is methane hydrate?

Methane hydrate is formed by the reaction of water and methane gas at high pressure and low temperature. Methane hydrates are white, ice like crystalline solids that consist of methane and water. In methane hydrate, a methane molecule is surrounded by a cage of interlocking water molecules and form a crystalline structure.