> > Yes, rooftop home solar doesn't make a ton of sense at this latitude and especially not adjacent to this much hydro power.

Latitude is inclusive of the surrounding area, not just the city of Seattle.

Also in general when people refer to a city they are also referring to the metro area around it.

Yes, if you are concerned just about greenhouse gas reduction, and if you live in the Seattle city boundaries, then solar is not a meaningful way to make a reduction.

However many people who live in the Seattle Metro area, but outside the city itself, are shocked to learn how dirty PSE's power is.

For those people, getting solar installed might be meaningful.

And again counter to many people's expectations, Seattle does get enough light to make solar somewhat cost effective, especially with net metering in effect.