Answers

2015-12-19T12:09:11+05:30
Because we can get them back and use it again nd again
0
2015-12-19T12:11:36+05:30
Air is inexhaustible because  Inexhaustible resources are also known as renewable resources. the air is renewable resource. but you can not say sun is Inexhaustible because it is not renewable , it is reducing day by day.
0