Question

what is green house and for example

Answer 1

This is the source of the Earth's so-called "greenhouse effect", which both makes the Earth's surface warmer than it would otherwise be, and also allows the atmosphere to cool to outer space. The main greenhouse gases are water vapor, carbon dioxide, and methane.

Answer 2

The phenomenon of trapping sun's radiation by the gases present in the earth's atmosphere like Carbon dioxide and methane. These gases trap some radiations and the remaining radiations are reflected back by the earth's surface. Further, these trapped gases warm up the atmosphere causing global warming.