And in the 1970s, there was this very same "indisputable" proof that there was a huge cooling trend that would bring about another ice age.
H
Well, I think the idea is that there's a strong collection of EVIDENCE that global warming is occurring and humans are at least in part responsible for it. By the time PROOF comes along, there really won't be much point in arguing about it. But as for the idea that the scientific community was sounding the alarm bell in a similarly united fashion then over "another ice age" as they are now about global warming, well, I just don't think that's so:
http://www.realclimate.org/index.php?p=94
and, from here:
http://gristmill.grist.org/story/2006/11/23/18534/222
this:
"It is true that there were some predictions of an "imminent ice age" in the 1970s, but a cursory comparison of those warnings and today's reveals a huge difference.
Today, you have a widespread scientific consensus, supported by national academies and all the major scientific institutions, solidly behind the warning that the temperature is rising, anthropogenic CO2 is the primary cause, and it will worsen unless we reduce emissions.
In the 1970s, there was a book in the popular press, a few articles in popular magazines, and a small amount of scientific speculation based on the recently discovered glacial cycles and the recent slight cooling trend from air pollution blocking the sunlight. There were no daily headlines. There was no avalanche of scientific articles. There were no United Nations treaties or commissions. No G8 summits on the dangers and possible solutions. No institutional pronouncements. You could find broader "consensus" on a coming alien invasion.
Quite simply, there is no comparison."