Maybe lying is too extreme a word because in many cases they actually believe the fictions and bad conclusions they reach. I had the benefit of reading some of the early articles about the coming new ice age when I was a child during the late 70s and early 80s. I also had the benefit of reading hundreds of books on prehistoric animals and environments and how much and how frequently the climate changed.
It really becomes impossible to fall prey to the misplaced alarmism of kooks on the left once you know that the Earth and life survived huge swings in climate, impact disasters, and levels of carbon dioxide and temperatures that made most of the Earth a many times a tropical "paradise". Also we should be warned that we are living in what is considered an interglacial period and the Earth could easily slip back into a full blown Ice Age something I think would be far more devastating to life as we know it than anything brought on by "global warming".
I think this article does a good job of pointing out how flimsy the conclusions from global warming proponents are. These same people would gladly embark on billion dollar projects to fix what is not broken and if by chance they were successful could trigger an even worse consequence of accelerating the onset of the next ice age.