Greenpeace co-founder, Dr. Patrick Moore:
“[When we look at the long term history of Earth’s temperature and atmospheric CO2], it is glaringly obvious that these two key parameters are in an inverse correlation, at least as often as they are in any semblance of correlation.”
“This evidence alone is sufficient to warrant deep speculation of any claimed lockstep causal relationship between CO2 and temperature.”
Full talk: https://www.youtube.com/watch?v=d0Z5FdwWw_c