I have just discovered that former National Security Advisor to George H.W. Bush, General Brent Scowcroft, is on the board of directors of Al Gore's Alliance for Climate Protection. Cool.

Enough have persuasively argued that systemic planetary climate change is underway and represents an existential threat to our political and social systems -- as well as to humankind -- that I don't need to repeat all this.

But there haven't been many -- that...