Define the term environmental problem. Give an example of an environmental probl

An environmental problem is an imbalance or undesirable change in the environment. An example would be decreased air quality caused by pollution in Los Angeles. The perception of a problem changes due to one's definition of the word undesirable and the awareness of the consequences of certain actions. The environmental problems resulting from DDT use are undesirable in this country but are the lesser of two evils in a country with severe malaria problems. Still, we should accept the challenge of trying to control malaria-transmitting mosquitoes without major threat to the environment. 

seriously???u dont know what an environmental problem is???

I'm doing a review, I just want someone else's input.