In this video, coral reef ecologist Jeremy Jackson discusses the pathetic state of the ocean today, with indicators that things will get much worse. Jackson employs shocking photos and statistics to convince viewers of the gravity of the situation.
Natural gas is a clean source of energy, but fracking comes with many environmental drawbacks.
If people suddenly disappeared, very soon the planet would not resemble what it's like now. It also would not resemble what it was like before humans spread widely across the world.
Lake Michigan is one of the five Great Lakes. Pollution has been a problem for decades, but people are trying harder than ever to clean up the lake and to keep it from becoming further polluted.