Not sure why I'm getting involved in this discussion but Gary is right on the money.
http://en.wikipedia.org/wiki/Medieval_Warm_Period
http://en.wikipedia.org/wiki/Mini_ice_age
I'm not one of those people advocating pointless waste of energy resources. There definitely needs to be a reduction in consumption. The oil is running out fast.
The world is FULL of disgusting pollution of all kinds... toxic chems from factories and mines, raw sewage into rivers and oceans. There is deforestation, over-fishing, over-farming which will turn the planet into a desert if it continues. Wildlife habitat loss, reduction in biodiversity and species gene pools.
Cutting CO2 emissions by 5% or whatever simply won't do any good. If there really is a problem, then a small reduction after 1 or 2 hundred years of heavy industrial society will achieve jack shit.
I haven't examined the issue enough to know what's really behind this climate change movement, but I'm willing to bet my house on the fact that it's to take advantage of peoples' fear/paranoia to reap $$$ and power. Like the article in the first post suggests, this stuff is nothing but politics - it has nothing to do with science or reality.
Useful things to do IMHO:
1. conduct serious research into alternative energy. The fossil fuels corporations forbid this at the moment, but if nothing is done, society really is doomed. Because when there's no energy left, and no new infrastructure for alternative sources is in place, everything is *fucked*, pure and simple. The vast majority of humanity has lost touch with nature. It's simply incapable of fending for itself. The culture of reliance on the state and the comfort zone this induces is a very very serious problem and will end in tears and blood.
2. teach people that consumption is the real destroyer, of the planet and the soul. The relentless industrial scale food production is killing the land. Obesity is spiralling. Selfishness and exploitation is the prevailing way of life. Teach people that they should consume less to preserve the planet and each other.
Will any of these things happen? I somehow think not...