Questions

A greenhouse gas is a gas in an atmosphere that absorbs and emits radiant energy within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. 

Carbon dioxide is a main greenhouse gas, found in car exhaust pipes.
Methane and nitrous oxide is another type of greenhouse gas.

Oxygen is the only clean gas out there because we need it to survive. Therefore, the only gas that is not a greenhouse gas is Oxygen.

The Council of States (Rajya Sabha) is composed of not more than 250 members, of whom 12 are nominated by the President. The twelve members are chosen by him from among persons having special knowledge or practical experience in literature, science, art, and social service. The Constitution thus adopts the principle of nomination, for according distinguished Indians a place in the Upper Chamber (Rajya Sabha) of Parliament.

World hemophilia day is observed globally on 17 April.