If you haven't seen John Oliver's short treatise on the Paris Agreement, check it out!
Global warming can be eliminated by planting trees - true or false? Is global warming even real? The environment is a bit like economics - we know an awful lot about it and yet are unable to predict with reasonable levels of confidence when the next disaster will strike. Forget about predicting future disasters for the moment. What about air, water, and soil pollution about which we are certain? Astronauts in orbit around the Earth can see a blanket of smog wrapped around the entire planet.
A good course in environmental science will involve the following topics:
Students should be following the Journal of Environmental Sciences, and check out Pearson Education for a good collection of books on environmental science. McGraw Hill has a nice tutorial on environmental science available through its Essential Study Partner series. On a level appropriate for a student seeking college homework help, there is also a great online tutorial on environmental science offered by MIT's OpenCourseWare titled Environmental Earth Science.