Question

what are green house gases and how do they affect the environment?

Answer 1

green house gases are those gases which are present in our environment. for example co2, nitrogen, o2,etc.
all the green house gases are present in a fixed composition. if any one of them will increase or decrease then there will be lots of damage to our environment for example air pollution, acid rain

Answer 2

carbon di oxide,methane,water vapour, nitrous oxide, chloro fluro carbon.

As they increase the amount of the gases the sun heat is traped and it is reflected by the earth , and without no way it is absorbed by the earth,It affects the environment by global warming.