Nowadays, people have different opinions about what is the most important environment related issues; I am convinced that the most important environmental problem is the extinction of animals and plants.
One the one hand, some believe the main problem of environment is creatures are dying out from the world. More and more precious animals as well as plants have already vanished from the Earth in these years. This trend is due to the detrimental effects that human had brought which caused the extinction of creatures; many animals were forced to find a new home, and not every creature can adapt successfully. For instance, reports implied a certain breed of Australian fox die out approximately 25 years ago because human invaded their habitats, and they are likely to never return.
One the other hand, others believe there are other more important environmental issues, such as overpopulation and air pollution. Having an overcrowded living area could bring individuals a stressful lifestyle because of not sufficient private places. In addition, air pollution problems may cause people to be depressed since they cannot go out frequently. I do agree that such situations can bring inconvenience to life; however, related problems could be solved if people put efforts into it. Therefore, in my opinion, other issues are relatively less important compared to the extinction of creatures.
In conclusion, people have different opinions about what is the most important issue of environment; although I agree other problems are also important, there should be no doubt that the main problem is species are become extinct today.