Scare Tactics 4
Melting the icecap means that less solar energy is reflected back into space and that more heat is absorbed by the oceans. It is possible that the heating of the oceans will release Stored Methane "the Methane Hydrate gun". Methane is a 10x more potent greenhouse gas. Feedback cycles.
For more information on the release of greenhouse gasses as the oceans heat up look here.
For more information on how ocean species death means less Carbon Dioxide sequestered and less oxygen read here
Why the Global Conveyor might result in the next Ice Age for the Northern countries read here
