What did your search results turn up? Somebody on this board published a paper a little less than a year ago with data similar to the human output and nature output numbers you cited – although they didn’t cite their source, directly, if I remember correctly.
http://en.wikipedia.org/wiki/Carbon_dioxid…%27s_atmosphere – there you go. It’s wikipedia, so don’t trust just that – go to it’s sources. But that Mauna Loa data is the most commonly published data I have seen.
Also – the IPCC report. That’s great that the last page says that. But you must remember, thats the 2001 report. They published a 2007 report in March (http://en.wikipedia.org/wiki/IPCC_Fourth_Assessment_Report)
I’m not nullifying what the 2001 report said that you quoted – for all I know, the 2007 report says the same thing, so I can’t speak for that. Check it out…
But I CAN speak about the numerous professors, two of whom worked on the IPCC report, that I have had. The most common story they tell is that back in 2001 and even up until several years ago, they would have said, “Yeah, global warming is a real thing, but we don’t know if humans are DEFINITELY causing it – I wouldn’t put my life on it.” Now they are saying, “As new data pours in, we can say with virtual certainty that humans are causing it and that if we don’t take action IMMEDIATELY, we are going to suffer the consequences”
Whether or not that’s true, I don’t know, I do not study science – let me know what you find.
The problem I really have, which has been addressed here numerous times, is the “solutions” these professors propose. I don’t know if it’s due to the extremely liberal background of my university, or if they are just too lazy to think of other solutions, but the only thing they suggest is to write letters to senators and representatives asking them to approve climate change legislation, and that we need to take as much political action as possible.
Aside from the moral issues in government doing things like Kyoto, it’s just incredibly impractical, if the goal really is to stop climate change. I wish science professors, who have a credibility amongst their students as being incredibly smart, would just stick to what they specialize in – science. Leave economics and politics to the people who have actually studied such things and don’t adopt the attitude of “If something’s wrong, pass it along” – who don’t automatically assume that the best way to deal with problems is through the government.