"Human activities, however, ARE a major factor in causing massive environmental damage to topsoil, forests, waterways, oceans, the air we breathe, animal and plant species, and our own health!!!!

Well,have you not considered that all those human impacts you noted has an impact on climate? For exammple, the ocean, which pepresents the big part of the Earths surface, is a major player in climate...and even more so than terrestrial surfaces. Phytoplankton, produced at the ocean surface takes up atmospheric carbon,and the ocean stores it, in cases for thousands of years. The oceans have a tremendous capacity to absorb and store atmospheric heat. Global cceans circulation and currents transfer heat from one area of the Earth to others. Evaporating sea water is an important part of our hydrological cycle and weather generation (just look at El Nino). Human influences on the ocean can have a major impact on climate, and many of these aspects are inter-related and can (and, likely is) impacted by broad based human activities. Generally, we treat our waterways and seas as garbage dumps.

Not that long ago, fishermen and the public said we could never make a impact on global fish stocks....because they were so vast and had a limitless capacity to adjust to right our wrongs. Well, they were wrong and many major fish stoocks have either seriously declined, or are decimated. Just look at the ulf of Mexico today and say humans have no negative impact on important ecosystems that can have many far field effects.