Junk science are actually for those who think that increasing CO2 concentration amount is the main driver of global warming thinking in terms of strict casaulity.That is where your folly lies as a non-professional scientist yourself. A trapping of your own ill-prepared thinking and pre-conceived notions. The problem is that this is just not strictly a climatology field but rather a multitude of science fields such as geology, oceanography, geochemistry, astrophysics, atmospheric physics, limnology, sedimentology, dendrology, paleoclimatology, geophysics and so on and so forth.
Btw, there were hundreds of scientists who are global warming skeptics (i.e. man-caused) converged a a few months ago in a 2 1/2 day of climate change conference.
The Heartland Institute - Proceedings of the 2009 International Conference on Climate Change
My suggestion? Watch this powerpoint presentation. Simple yet explainable in some parts, quite heady to read in others of which I enjoy reading anyways (warning: big file 20 mb)
http://www.heartland.org/bin/media/newyork09/PowerPoint/Fred_Goldberg.ppt
It's funny how you keep on pulling up link after link to hardcore junk science. This Heartland Institute is known for denying dangers of tobacco in the past, now it's climate. Heartland won't reveal who it's sponsors are, but have been sponsored by for example Exxon. It's goal is to promote a free market.
As for houndreds of scientists agreeing, check this link where many of them are horrified to be on this kind of list from Heartland.
Kevin Grandia | Outrage in the Climate Science Community Continues Over the "500 Scientist" List
This is called junk science.