"The evidence" in science is peer-reviewed research from those in that particular field of study. Gravity still hasn't been scientifically proven, either. Science is about odds and probabilities. A petition or a talk radio guy screaming into a microphone isn't go to change the actual numbers that have already been recorded. If you are so concerned with proof, then there is a whole lot less evidence available to prove that 1,000s of climate change scientists are part of what would be one of the biggest conspiracies in history.
No, evidence of fact in science is based off of accurate results from a tested hypothesis. Gravity is an accepted theory which is considered a law of science. There is no question that the force we have dubbed
gravity exists. It does. We simply do not understand it fully.
If we are talking numbers here, then there are far more scientists who call bullshit on global warming than those who support it. This isn't an opinion, it has been the consensus since this nonsense hit the mainstream in the 70's.
The formula here is as follows:
Purchase the opinions of renowned scientists with a similar agenda, gather a collective of politicians with the same motives, use mainstream media outlets to push that agenda, and then you have something called Global Warming.
100 thousand scientists screaming at the top of their lungs can not compete with that. You hear the stories that you are meant to hear, as well as the
evidence, facts, and repetition of those opinions.
As it was pointed out by others recently, many other scientific reasons explain current climate changes; such as celestial and natural global changes.
We been taking accurate daily temperature (and such data) measurements of the earth for what? less than 150 years. The earth is how old? The earth has been through fire, ice, tropical, and current climates swings for billions of years- WITHOUT our "polluting" it; according to the same science using the sediment of the earth as a measure.
More oil leaks naturally into the sea by an exponent of what we have spilled. Natural wildfires have scorched more of the forests than we have ever chopped down. The list goes on and on, as it has been the natural cycles of the earth since it was formed.
There is nothing wrong with being conscious of how we treat the earth and nature, or by recycling our waste. These practices are of merit. However, doing so because we believe that we are going to kill the planet is ridiculous at best.
There is no solid evidence that we have ever influenced the climate of earth in any way.