I think the web site went over this ground very well. The signers of the petition are in scientific or engineering fields and are well versed in the scientific method.
There are climate scientist who do not subscribe to the man made global warming hoax. And it is a hoax. I base my knowledge in the life time of reading everything I can. I have found some of the most useful knowledge comes from completely unrelated sources. Like the Nenana ice classic. Like the story I read years ago about how Greenland got it's name.
Are you not some sort of geologist or am I confusing you with some-one else on this board. I would be willing to bet you could build a plane because I am sure you can read and do some math. I am sure any-one who can read can come to a conclusion on MMGW.
Sadly, too many people are believing in the MMGW hoax.
Global warming is not man made. It is part of a cycle. The planet gets warmer. It gets cooler. This ball of mud and water has been much much warmer and much much cooler in times past. In the short geological history that modern man has been on this planet, we've had what? An ice age, a mini ice age and during the Renaissance the temperature was an average of 5 degrees warmer than it is now. In fact the Renaissance is when human populations exploded on this planet. If I had a choice between global warming and global cooling, I'd pick global warming.
Ok, so I've heard we've experienced a 10th of a degree change in temperature, 3/10ths of a degree change in temperature and 7/10ths of a degree change in temperature. As far as what I know, I'd go with the 3/10ths of a degree change. Let's just assume for the sake of argument, that global warming is man made. (Now in no way is this an admission that global warming is man made. I said we are assuming. And don't give me any of that garbage of, "You know what you do when you assume.") So what do we do to drop the average temperature by 3/10ths of a degree? How many trillions of dollars do we spend dropping the temperature that 3/10ths of a degree? How far back into the dark ages are you willing to go? More importantly, how much power are you willing to give to government over your life for 3/10ths of a degree change? And a change in average temperature that's really not an average temperature at all. It's an average temperature since records have been kept. But for how many millinia were the temperatures on the Earth virtually unknown?