What's the target climate

Rob Dunbar, oceanographer and biogeochemist, has been involved in drilling into the sea beds, corals, and ice sheets. He wants to determine real baselines for fixing our current climate.

He points out in his presentation that we have to go back some 15 million years to find CO2 levels equal to what they are today. He also states that even for climate skeptics, there is no denying that the amount of CO2 dissolving in the ocean is leading to an increase in acidification.