In reply to FredMead:
> (In reply to danm)
> I was mearly stating that 0.08% is enough to be natural fluctuation. 14%!!! Thats a load of cock! who told you that?! I asked my uncle who is a Geography professor to check my original post on the matter since he was at my house. He gave me the stats.
For a start, the overall increase depends on when you count from!
It may well be that *as a percentage of the total atmposhere* the amount of CO2 has only increased by 0.08% (from some specified date), but as a percentage of *the total amount of atmospheric CO2* it certainly has increased by 14% in the last, what, 50 years or so (from 310 parts per million to around 360 parts per million). And that's the important figure. So Danm is not "talking cock".
And I don't know where the 0.08% figure comes from, anyway. Figures I have for atmospheric CO2 are 0.036% of the atmosphere now, and 0.031% of the atmosphere 50 years ago. Maybe your uncle is a factor of 10 out (ie the increase figure should be 0.008%), and is quoting figures from a 1900 baseline when the figure was 290 ppm , or 0.029%, which would give an increase of 0.007% since 1900....close to your uncle's value, if he was a factor of 10 out!
Whether you argue that the increase is down to natural fluctuation or not, it's important to realise that quoting apparently small percentages, of itself, means nothing. Tripling the amount of CO2 in the atmopshere, from 360ppm to 1080ppm, would still "only" result in it making up 0.1% of the atmosphere, but that apparently tiny proportion of CO2 (as an overall percentage of the total atmposhere) would have huge consequences for life.
So no, danm is *not* talking "a load of cock" and I suggest that before you go dismissing peoples' posts in such a rude way, it would perhaps be better if you actually took the trouble to inform yourself a bit more first.