Finally found it....
Seattle IS attempting to provide "green" energy, but for now, Seattle City Light's web site says they are buying offsets & importing wind generated electricity plyus maximizing hydro generated electric. (keeping the problem upstream or pushing it downstream)
A mini-version of Kyoto, where one can buy "credits" without actually having to do anything.
See this goes right along with our mandated green public buildings that cost more to maintain and keep people less comfortable.
If they were REALLY concerned about so-called "greenhouse gasses" they would use nuclear power.
It produces none of those...