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Tod
I've given some thought to this and read your posts.
I think my problem with the whole global warming thing is that science and politics are so intertwined that it's hard to know what to believe.
1

o I think the earth is warming? ...yes if not I would be living on a glacier.
2:do I think it is at least partly caused by human activities?....probably to some degree.
3:do I think this is a bad thing?...I have no idea and according to your post neither does the concensus.
3:am I willing to live in a shack and ride my bicycle to the site where my job used to be to lower my carbon footprint?...NO! Not without a whole lot more evidence of imminent disastor.
4:am I willing to let a coalition of politicians socialists, environmentalists, vegans, luddites, and 3rd worlddictators, each with their own agenda control our economy and nearly every aspect of my life in the name of saving the planet.?....HE'LL NO.
The sky has been falling for most of my life and this just looks like the latest version to me.
mike
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Mike, let me give you some responses that I think may be useful...
As for 1, yes climate exists outside of the impacts on humans, the climate has changed all over the place in the periods we can measure. The thing that has scientists concerned is that the temperature changes are occuring faster than they have in the past. These changes are thought to be related to CO2 emissions, since CO2 traps heat the earth is warming. CO2 and other greenhouse gasses are being emitted at an amazing rate and temps are going up faster than they have ever done before. This is a correlative relationship, but we do know that CO2 traps heat, that the recent increase is human-caused. Within the sciences, there is extremely little debate on this issue. There are no well-credentialed and active scientists (i.e., expert) that I've ever seen argue this point.
As for 2, that is where I'm at. The issue is what is a small change? The average person doesn't appreciate how minute changes in average temperature can impact the natural systems that surround
us. The range of plants and animals is one relevant to the initial post and an average of a degree shift in temp although it may not sound like a big deal has a big impact. Minute changes can drive ranges such that populations can go extinct or species. There are literally thousands of research papers addressing these ideas and few of them come away with the idea that the changes will be for the better.
As for 3, that is fine, but that isnt' the science. How you deal with the info is your choice and obviously that will dictate how you vote. The scientific coinsensus is that it is likely going to be bad. If you would like, I would be happy to find a couple things to read. Changes in temperature and climate will have impacts on wildlife, agriculture, and our checkbook. My feeling is that the impact on our checkbook will be negative if we work to fix it or not, but the benefit of working to fix it is a positive for the environment we all enjoy. There is a huge difference between saying I dont' believe the science and I dont' care about the science, those are two different issues.
Same with 4 as 3.
OK, now with the point about the sky falling your whole life – I appreciate that feeling. I agree with you, but let me point out what you are not appreciating, but you probably know.
Sky falling issue #1. DDT, the organochlorine insecticide that bioaccummulated in top predators birds (Bald Eagles, Osprey, Peregrine Falcon) and interfered with reproduction. DDT was causing these birds to go extinct in many parts of their range. Many states had none of these birds in the wild because of DDT, when they previously were present (sometimes abundant). Scientists figured out that it was DDT and it was banned. At the time there was an absolute shit-ton of debate – it was a huge fight. After the ban and a ton of effort and money the birds are back and we have lots of useful and important pesticides to replace DDT. There was a period when all three of these birds were extinct in my state, but now I see them all the time.
Sky falling issue #2. Acid Rain, caused by nitrogen and sulfur compounds (NOX and SOX) emitted when burning coal acidified large portions of pristine wilderness in Canada and the NE US. Pristine lakes far removed from human impact were becoming devoid of fish because of precipitation laden with NOX and SOX altered lake chemistry. After a ton of debate and fighting, regulations were put into place to reduce NOX and SOX in coal-fired plant emissions. The issue has improved and many lakes that were fishless have fish again.
Sky falling issue #3. Ozone hole, caused by use of CFCs. CFCs were widely used because of their many useful properties, but are now limited in use because high in the atmosphere they were causing a breakdown of the ozone layer. The fight was huge with arguments on both sides – once CfCs were banned the problem began to correct itself and now we all use solid deodorant, not spray.
Yes, the sky is always falling, because it is - we keep breaking stuff that has to be fixed, because we need to take to live, I accept that and I accept my impact because I see no other way. I do not believe that any of the above issues had anywhere near the consensus within the scientific community that climate change has. I have never seen anything that made me think that clamate change isn’t a big deal on many levels. It will affect the environment, our food supply and our checkbook, not matter what we do or don't