MikePA said:
Just because someone called a scientist (or scientists) guess at the cause of global warming doesn't mean it's science.
1. Observe
2. Develop an hypothesis why
3. Create an experiment to prove or disprove the hypothesis.
They've observed and they have an hypothesis. Because they've failed with Step 3, they're reverted to scare tactics.
100s of years ago 'a consensus of scientists' thought the earth was flat and they sought to silence anyone who disagreed with them. The same thing is happening today, e.g., Dr. (scientist) Heidi Cullen of the WeatherChannel suggesting that any weather person who disagrees should have their AMS certification revoked. When you can not prove (Step 3), silence those who disagree.
Mike brings up an excellent point. How do we create an experiment? In my line of work (engineering) we "simulate" our projects in a variety of ways - from the geometry (3D CAD), to the electrical, mechanical, and thermal properties via finite element analysis. Critical components or assemblies are
always "experimented" on. We build a prototype and test as needed.
I'm at a loss as to how to create an experiment to prove or disprove man's contribution to climate change. The simulations that the scientists come up with do show correlation, how do you prove causation?
I keep coming back to
the precautionary principle. Given that a scientist (1) observes rising temperatures, (2) Hypothesizes that man is contributing greenhouse gases and (3) Lacking a good experiment, develops a simulation that shows a correlation between our emissions and climate change; why shouldn't that scientist sound an alarm?
I suppose that nobody reading or participating in this discussion has changed their view of man's contribution or lack there of to climate change. I do, however, have a better understanding of why some don't believe (or perhaps more acurately haven't been convinced) man is contributing.
The consequences
We've touched on it a bit, but I'd like to more directly discuss it (remembering to be on our best behavior

). We should all be concerned about what political/policy etc. changes may come about in the aftermath of the IPCC report. Personally I hope to see more of an incentive based push for more "sustainable" living vs. a penalty based policy. For example:
Greater tax credits for renewable energy projects (small & large), conservation projects (better insulation etc.)
Stricter effeciency standards for homes and cars (yes this will increase the cost of ownership)
The question is, how does a government raise revanue to pay for renewable projects? The "environmentalist" solution is to tax carbon emissions - gas tax at the pump, tax carbon emissions from powerplants etc. By any measure my family is relatively "wealthy". If I had to pay $5 a gallon for gas, It wouldn't be pleasant, but it wouldn't have an immediate detrimental effect on my standard of living (though if sends the US into a depression it might). Those less financially fortunate are hurt most by increases in their basic cost of energy consumed.
There was some discussion that the UN was a redistributor of weath (no arguement here). I am lost as to the relation ship between redistribution of wealth and climate change. Most proposals for combatting CO2 emissions seem to be anti- redistribution of wealth. Perhaps someone can explain this to me.
So - what changes do y'all see coming that are good or bad?