Prof. Murray Salby presents ‘evidence that the ice record heavily underestimates the fluctuations of the CO2 concentration, especially the high-frequency (short-period) oscillations that occurred a long time ago. If that’s true, it’s pretty likely that concentrations above 400 ppm may have been rather mundane even before the industrial activity’

By: - Climate DepotJune 13, 2013 11:47 AM