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Politics : Formerly About Advanced Micro Devices
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To: i-node who wrote (890350)9/27/2015 7:39:44 PM
From: combjelly  Read Replies (1) of 1574764
 
None of those things are in dispute by rational people. CO2 concentrations have gone from about 280ppm to about 400ppm. We have mined enough coal and pumped enough oil and gas since 1800 to produce just about the same amount of CO2 as is in the atmosphere today. So that increase is ours.

As to whether or not global warming is hazardous, don't be stupid. Just the rising sea level will cost us trillions of dollars. A lot of major cities are going to be affected. The West Antarctic Ice Sheet has been destabilized. That alone will account for 6 to 10 feet. And it can happen relatively fast. In the past, it tends to disintegrate by sending out swarms of icebergs in pulses in a very short period of time. Granted, it takes time to melt, but they displace their weight in water immediately.

Not to mention rises in CO2 has been implicated in several of the mass extinctions. From the Triassic to the Jurassic atmospheric CO2 concentrations about doubled, probably due to volcanoes. Given that plant species were almost unaffected, CO2 is pretty likely the factor.

And that brings us to clathrates. If they destabilize, they release a lot of methane. And the process has started. There are a lot of clathrates locked up in tundra. In Siberia, there are these mysterious holes opening up in the tundra. They likely are the result of clathrates getting warm enough to destabilize and blowing big chunks out of the ground. Another place where there are lots of clathrates are in the oceans. Particularly the Arctic Ocean. And there are signs that clathrates are being destabilized there, also. Methane is a powerful greenhouse gas. This process has been implicated in the Permian-Triassic extinction event. Known as "The Great Dying", the overwhelming majority of existing animal species went extinct. Even insect species, which are usually not greatly affected.

So no. There is no debate or dispute.
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