Past episodes in the earth's history, especially one that occurred about 55 million years ago,
featured drastic warming accompanied by sea - level rise and other events that would be calamitous for today's civilization.
The amount of sea ice in the Arctic has fallen to the lowest level on record, a confirmation of
the drastic warming in the region and a likely harbinger of larger changes to come.
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Clouds are a large negative feedback that will stop
any drastic warming.
Objection: Clouds are a large negative feedback that will stop
any drastic warming.