This is not directed at you, phantom power, but I thought it needed to be posted based on some comments in this thread.
Anyone with half a background in science knows that proof for a scienctific theorem is ridiculous. You do not
prove theories using the scientific method, you test them by trying to
disprove them. Science is constantly evolving and should always be open to new ideas. The reason is obvious in the science forum
(LINK).
There are always alternative theories, no matter how outlandish, to any theory. We simply test each hypothesis and accept the one that cannot be disproven and best explains the phenomenon. With further testing, the hypothesis is refined and recieves greater acceptance by the scientific community. It then becomes a theory.
The "skeptics" use a lack of knowledge about the scientific method to create doubt by demanding proof of the greenhouse gas theory of global warming. They then throw out sun spots, cosmic radiation, and other wild theories to try and weaken public acceptance this theory. Everyone of these alternatives have been tested and disproven as the cause for the current warming trend but they use them to sow doubt. The general public doesn't realize the volume of research that supports this theorem not how the scientific method works so it is partially effective.