Humans caused the Ozone H*** in the Earth's Atmosphere. Who says the Earth and its atmosphere are too big for Humans to influence? Humans have raised the total parts per million ("ppm") of CO2 in the Earth's atmosphere to 389 ppm. That is 39 ppm above the so-called thermal runaway tipping point. Above 350ppm, the Earth's average surface temperature is uncontrollable (ie: in thermal runaway). At that level, no natural nor artificial process can keep the average temperature on the Earth's surface from increasing. The melting glaciers on Mt. Kilimanjaro are the canaries in the coalmine here. Take a look at the rest of the photos and you'll see the effects of human generated Global Warming.