For me, this falls under the heading of “we-got-it-right-this-time.”

Global cooling. Global warming.

Particulates. CFC’s. Carbon dioxide.

Natural cycles. Anthropogenic.

There is no such thing as an “ideal temperature,” only an ideal temperature for us to inhabit all current climates. Even if the temps go up ten degrees Celsius, and all humanity dies from swine flu, nature will always find her new balance.