I am no scientist and do not hold a degree, but...
My one question: Since when did we start trusting the weatherman? All of a sudden we base the end of man on what an extremely small margin of science dictates? Regardless of how well they're funded and politically backed, I think the whole premise is ridiculous.
Remember, this is coming from the same people that can't accurately predict what's going to happen on Tuesday, yet we've been convinced that man is the scourge of the planet and every day we drive, smoke, breathe and crap we're contributing to a fiery of hell on our own expense. Either way, I'm packing my raincoat, fleece sweater, mukluks a spare t-shirt and sunscreen. 10 years in the army will learn you that.
100 or so years of tracking weather doesn't unlock the key to the earths climate, make all the models you want, I'll bet my next pay check on you being full of it, but I do know there are a ton of people that are filthy rich because of all of this shenanigans, and the average middle class Joe doesn't seem to be reaping the benefits as per usual. Only change is now we're paying more for CFL bulbs, fuel, dual flushing toilets, electronics recycling, tire disposal oh and some corporations are supposedly paying a C02 emission tax...I emit C02 also, when should we start taxing that?
F Al Gore and the weather man
Fun fact 1: The earth is a big rock floating in space in the sunshine. We can look at little rocks in space, asteroids, and take their temp by thermography, just like my IR gun, or an IR camera. A simple pattern emerges: blacker ones are hotter, whiter ones are cooler, closer to the sun hotter, further ones are cooler, etc. If you plug the earth into that pattern (its distance and average 'color') it should be cooold. In fact, about 0°F, on average. In reality, the average temp of the earth is ~60°F.
Fun fact 2: Geologists have found evidence for something called 'Snowball Earth', sort of a super ice age where we don't just have glaciers on land, but the entire ocean freezes over all the way to the equator! Of course, this was a billion years ago, but they find fossil evidence that the big snowball happened several times, and each time lasted for millions of years. Crazy.
These fun facts make sense because of the greenhouse effect. Gases in the atmosphere of the earth block IR from leaving, keeping the earth warm. And it is not a small effect. It is a 60°F effect, globally. If you take away the greenhouse effect, the earth would freeze over solid, and this sort of thing has actually happened multiple times in the past.
Now, there are multiple greenhouse gases, but CO2 is a major one of them. Over all of recorded ancient history, the CO2 in the air has been ~290 ppm and not changed much. All the CO2 emitted by human activity since the industrial revolution has bumped that up by 100 ppm to 390, or about 35%.
So, if the greenhouse effect heats the earth by +60°F, and we crank up one of the major gases by 35%, do you expect the earth might heat up a little? I would, it's actually common sense. The question is how much and how fast. The answer from 20 years of calculating....maybe 3°F and several decades. Not crazy, crank one major gas up by 35%, and the greenhouse effect goes from +60°F to +63°F, or a 4% increase. That is what the weathermen are saying.
And +3°F is def not the end of the world. It is prob enough to turn some regions that are almost deserts into deserts, or kill off some tree species near the edge of their range, and maybe some pest species don't get killed by a hard freeze, and their range expands. So, there are costs. It will def suck for some folks.
Of course, it doesn't stop there. CO2 is going up by 2 ppm per year, and accelerating. So if the world population and economy keep bumping along, we are on track to add as much CO2 as we have in all history in the next 30-40 years (depending on growth). And then we are talking 5°F and bigger impacts. And then there could be another 100 ppm in the next 20-30 years after that and even more impacts. That is the current trajectory....enough CO2 by 2100 to boost temps not by the current 1-2°F relative to 1950, but more like 10°F.
Of course, 2100 is a long way away. The good news is that most of that worrisome carbon is still in the ground, and that there are lots of ways that we can reduce current CO2 emissions AND save money. Which ones you do will depend on your situation, your pocketbook and (maybe) your politics. Why don't you try some?