$CO_2$ is called a greenhouse gas because ......

Which of the following gases contributes $14\%$ to the greenhouse effect?

The two gases making the highest relative contribution to the greenhouse effect are:

The given diagram represents the greenhouse effect.
$I.$ Greenhouse gases absorb infrared radiation from the earth. The absorbed radiations are again emitted towards the earth's surface,heating it up.
$II.$ $CO_{2}, CH_{4}, CFCs$ and $N_{2}O$ are the gases responsible for the greenhouse effect.
$III.$ An increase in the level of greenhouse gases results in considerable heating of the earth,leading to global warming.
Which of the statements given above are correct?

Select the correct option regarding the relative contribution of various greenhouse gases to total global warming.

Which gases are responsible for increasing the temperature of the atmosphere?