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…
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…