Twilight Hue
Twilight, not bright nor dark, good nor bad.
That's exactly the kind of information I like to see. Not just predictive modeling and theoretical assumptions of what the future might look like. Something concrete like that would go much further than what we see at present in the arguments made thus far.We can measure what is man-made CO2 versus natural. Fossil fuels have a different ratio of C12/C13 than fossil fuels do. As a result we can see that the increase in CO2 is due to human and not natural events. We are the cause of the rise in CO2, there is no doubt of that. We are the cause of AGW. Do you need any links on how and why the different ratios exist? If not I can explain it to you. Plants and other life take in C12 slightly better than C13. Both are non-radioactive in case you were wondering. As a result fossil fuels are C12 rich. And as we burn more and more fossil fuels the percentage of C12 has been rising:
The Smoking Gun of Global Warming - Planet Experts
While I'm not completely 'converted' to the ringing alarm end of the spectrum, it certainly has prompted me to go softer on the issue in light of actual evidences that point in a particular direction.