Answers

2016-02-01T19:14:14+05:30
Any class of compounds of hydrogen, chlorine, and fluorine, typically gases used in refrigerants and aerosol propellants. they are harmful to the ozone layer in the earth's atmosphere owing to the release of chlorine atoms on exposure to uv radiations. 
0
2016-02-01T19:14:20+05:30
These are the gases which release from your refrigerator and AC
These are very harmful gases for enviroment
0