Global Warming

I reckon it's easy to agree with climatologists that our planet is warming ... and there's a correlation between CO2 levels and Temperature: Click on the chart and look at the recent increase in CO2 concentration. Current theories suggest that temperatures rise, then CO2 levels increase after a delay of maybe 800 years. The increased CO2 causes further temperature increases: a CO2 feedback. But it ain't easy to conclude that it's caused by human activity, like CO2, hydrofluorocarbon and other greenhouse gas emissions: There's sunspots activity, wobbling of the earth's axis, precession of the earth's orbit, changes in cosmic radiation, interstellar dust etc.. Now, if'n we could change all these, eh? But then there's this infamous hockey stick chart (promoted by Michael Mann, obtained from tree ring data) which appears to show a dramatic increase when humans were doing their thing:: Click on the chart Canadian mathematician Steve McIntyre has demonstrated that it's been "doctored". Then comes climategate and the manipulation (and destruction) of data by those promoting Global Warming. Mamma mia! It'll be interesting follow the discussions at the Copenhagen Climate Conference. So why would climatologists (with scientific training and peer-reviewed publications) ... why would they corrupt their data? Could it be that research grants are then more readily available?