What is at peril is the environment that humans live in.
Very good point. Please forgive my hyperbole with "doom" – but I would still maintain my point, just worded more like:
"I just have a hard time conceiving of the idea that a world that has survived this long, shrugged off countless volcanic eruptions, meteor strikes, massive unchecked wildfires, etc is now suddenly on the brink of catastrophe for humans
because of the internal combustion engine and the like."
Perhaps it's a product of my over-active imagination… or just seeing too many sci-fi movies… but I like to imagine what it would have been like if our civilization had developed to current levels before the last ice age.
Can't you just picture the emotional and hand-wringing debates going on in the UN and in congress and parliaments around the world – passing resolutions demanding that we double our greenhouse gas emissions in 10 years, mandating that vehicles get rid of their catalytic converters and decrease their gas mileage to 'improve' the output of the greenhouse gasses so necessary to preserving our way of life.
… I particularly like to imagine these pre-Ice Age people sneering at anyone who selfishly drives one of those tiny high fuel efficiency cars for not caring about the planet!!
Anyway – I realize that's sheer fancy, but the part that isn't is the fact that in the last ice age, the city where I currently live (Spokane, WA) was hundreds of feet under glacial ice.
Even if we'd been around at the start of the Wisconsin Glaciation (Which spread ice down to 45 degrees North Latitude, and lowered sea levels by 120 miles) it's almost certain that all of our best effort to pump Co2 into the atmosphere would have made minimal-to-no difference, because the Ice Age was put into motion and sustained by
global, solar, and maybe even universal forces so powerful and broad in scope that it's difficult to imagine.
Jump forward how ever many thousands of years to the end of that ice age, and it's again difficult for to imagine how we humans could have stopped the retreat of those same glaciers.
My home town went from buried under the depths of the ice to now regularly getting up to 100 degrees in the summer. Global warming indeed! And happily so! For everyone who lives and farms here… and everyone that enjoys the best Apples in the world, grown right here in formerly ice covered Washington State.
Again – this is getting far longer than I intended… I guess I'm just saying that given the history of our planet and its cycles and the awesome forces that regularly alter its climate, I just don't think very highly of mankind's ability to alter these systems.
As you suggested Peter, if the current warming trend continues, plants and animals may indeed migrate to entirely new areas, new diseases will arise, and the coastline of our planet will change dramatically.
But how is that different than any other time in our world's history?
But let me close again by saying, I DO believe the vast majority of scientists when they say the Earth is warming – I believe we must continue to work on human pollution – I'm just a bit more humble about how much of a difference mighty humanity can make on world as vast and dynamic as ours.
Clean air, Clean water, preserve the rainforests… sign me up! Save the planet? After it's tried to kill us with all the hurricanes, earthquakes, wild fires, tsunamis, volcanoes, lightening strikes, hail, ice ages, diseases, and floods?!? This planet is on it's own, buddy!
