solarseven
The scale of the problem
Regardless of your political or scientific views on global warming and whether it is the result of human activity, a massive body of evidence now drives the global consensus among scientists and world leaders that climate changes are coming on a grand scale and that even under the most optimistic scenarios, attempts by humans to mitigate them will have only minor impact.
Global warming was not even on the radar screens until the late 1900s when concerns arose over the ozone layer and the level of carbon dioxide in the atmosphere. When scientists began