Answers

2016-07-15T17:17:44+08:00
Its a form of harmful substances that can harm the environment and the people.. actually, you can also find this example in refrigerators

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2016-07-16T17:37:58+08:00
Those are the harmful gases mostly emmited by refrigerators, and sprays. that somehow contributes to global warming and also said that the cause of ozone thinning



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