Answers

2015-09-27T08:55:46+05:30
Ozone layer protects us from uv radiations . which is harmful for us .which may cause skin cancer.
0
2015-09-28T17:22:07+05:30
Ozone layer is very important for survival as it protects us from harmful ultraviolet rays of the sun which can cause skin cancer and other skin diseases.
1 5 1