3) Are greenhouse gases beneficial? Harmful? Explain your answer.

 Greenhouse gases are harmful to the environment.

Explanation:

greenhouse houses increases global warming and ozone depletion. methane, carbon dioxide, nitrous oxide and other harmful gases from the greenhouses. The combustion of fossil fuels and petroleum releases huge amount carbon dioxide in the environment. The gases trap heat in the atmosphere thus increasing the overall temperature of the earth- global warming. Global warming leads to a series of problems like climate change and ozone depletion.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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