Archives for December 3, 2007

Cute power density factoid, which I owe to Eric Chaisson: humans have far higher power densities than stars. The solar luminosity is about 4.10^27 W, the mass is about 2.10^30 kg; so the power density is 2.10^-3 W/kg. Human use ~2800 kcal/day ~ 120 W. Mass is ~80 kg, so 1.5 W/kg. Isn’t that fun?

Just a post-of-record, following Brian Schmidt, that I have a $333 bet against Joe Romm, with me taking the “cold side” of: at no time between now and the end of the year 2020 will the minimum total Arctic Sea ice extent be less than 10% of the 1979-2000 average minimum annual Arctic Sea ice…

CDM scandals?

Internatioanl Rivers says The great majority of hydros in the CDM would very likely be built regardless of receiving credits (in CDM-jargon they are “non-additional”), in contravention of the mechanism’s basic principle. The CDM was designed to issue credits to projects that are “additional”. They point out that More than a third of the large…