How Did Al Gore Promote Peace?

So Al Gore won the Nobel Peace Prize. Maybe I’m confused, isn’t it supposed to be for work relating to peace?
I did a little research. According to the Nobel Foundation’s bio of Alfred Nobel:
Nobel’s will was hardly longer than one ordinary page. After listing bequests to relatives and other people close to him, Nobel declared that his entire remaining estate should be used to endow “prizes to those who, during the preceding year, shall have conferred the greatest benefit to mankind.”
That doesn’t sound like it is restricted to peace related work, really it could be anything. That’s why there are prizes given in multiple fields: Physics, Chemistry, Medicine, Literature, Economics and Peace. Al Gore and the Intergovernmental Panel on Climate change were awarded the Peace Prize:
“for their efforts to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change”
That explanation still has nothing to do with peace. Regardless of your views on the veracity of An Inconvenient Truth and climate change, it is an environmental issue. Spreading the word about global warming is not peace work. I am totally baffled as to how this could be justified.
Salon has a dubious explanation and these people are thrilled, but I’m still not convinced.
I guess the Economist sums it up best:
Evidently the committee has decided to redefine the award as the Nobel Prize for Making the World a Better Place in Some Unspecified Way. In that case, Al Gore and the IPCC seem pretty good—though controversial—choices. The IPCC has put together scientific knowledge on the subject in a form comprehensible to policymakers; Mr Gore has pushed the policymakers to take action.
On top of that
http://news.bbc.co.uk/2/hi/uk_news/education/7037671.stm
Gore climate film’s ‘nine errors’
Al Gore in promotional still
Al Gore’s film was sent to schools in England, Wales and Scotland
A High Court judge who ruled on whether climate change film, An Inconvenient Truth, could be shown in schools said it contains “nine scientific errors”.
Vaclav Klaus - perhaps one of the only politicians in recent history to have anything approaching moral authority, at least in my opinion - has some harsh words for Gore.
http://www.truthnews.us/?p=273
Of course they gave Gore the honor. Anything to shore up the image of the anthropogenic warming theory, which derives its support more from popular perception than through accurate science. As Gore himself has said, it’s become a moral issue, not a scientific one. If you don’t believe in global warming, you must hate the planet; and if you don’t buy terrorism, you’re a traitor. The former keeps the left scared, the latter frightens the right, but both are the most massive of lies.
The IPCC is bought-and-paid for fake science, and Gore is the same cynical politician he’s always been, chasing after attention, wealth and power regardless of the truth of his cause.