Some people think that ecological problems are a real threat on earth while others are sure that there is nothing to worry about нужны аргументы в пользу второго мнения: (не о чем волноваться) 2-3 аргумента кратко, на расписывая сам аргумент.

 For example, the global shipping and airline sectors are projected to continue to expand rapidly every year, transporting more of us, and more of the stuff we want to consume, around the planet year on year. But think about this. In transporting us and our stuff all over the planet, we are also creating a highly efficient network for the global spread of potentially catastrophic diseases. 
Environmental pollution encourages students to research, investigate how and why things happen, and how to save our planet. By developing and enhancing critical and creative thinking skills and also creating new original ways of helping environment, environmental problems helps foster a new generation of informed consumers, workers, as well as policy or decision makers. Quote: hard times create strong man