I don't think adding content on "green computing" is really as big a shift as it appears to be on the surface.
SPCR has folowed a logical progression over its half-decade lifespan, (wow, that makes it sound like a long time!) starting first with homebrewed solutions in to making existing computers less noisey, but then transistioning into solutions for the noise's underlying causes.
It's really always been about ergonomics
not just noise. Green is a logical growth of that, and has always been here, at least a lttle bit. just count how many times Mike has complained about superfluous packaging materials in HSF reviews.
For me the issue isn't as much, "Should SPCR have content about Green Computing?
", but "Is SPCR the best place for content about Green Computing?
" On this I agree with the comments that this probably isn't the best site for it. Not because it doesn't belong, but that here it won't get the attention it deserves.
Maybe a good intermediate step would be to create a new subforum for GC? That only takes 30 seconds to create, and would be a gauge of how much interest there is.