Why is the current levels of greenhouse gas emission harmful for the environment?
A - Because the gases inadvertently cause rising sea levels because they cause the ice to melt.
B - Because any amount of greenhouse gas emission is harmful to the environment
C - Because greenhouse gases, when they come into contact with water, cause a specific kind of rain called acid rain and they are occurring more and more often.
D - Because greenhouse gases are important to trapping heat in the atmosphere and keeping Earth's temperature hospitable, but the current levels of gases are too high and trapping too much heat.
Answer: D - Because greenhouse gases are important to trapping heat in the atmosphere and keeping Earth's temperature hospitable, but the current levels of gases are too high and trapping too much heat.