Statoil engineer, Michel Myhre-Nielsen says that high uncertainties, big risks, and large investments are all part of carbon sequestration plans.

NPR: Scientists Hunt for Solution to CO2 Problem

To help shed light on what to do when it seems no one can help, we put Myhre on the telephone with two physicians, Dr. Michael Victoroff and Dr. Gail Gazelle.

CNN: Help! I'm not feeling better

Gunnar Myhre of the Centre for International Climate and Environmental Research in Oslo, for example, notes that the amount of black carbon in the Arctic is small and has been falling in recent decades.

ECONOMIST: Climate change in the Arctic