Some interesting ideas and Greenbank's list is pretty comprehensive, but does anyone think it'll make enough of a difference?
I can't see it, maybe if everyone in the developed world did everything on that list and the rest of the worlds population remained at their current sustenance or below level we'd survive. It isn't feasible for the entire world population could have that lifestyle, is it? All we're doing, all we can do, is find better ways to maintain the same lifestyle, when what needs to be done is to find a different way of living. A better way to cut he grass, a better way to cross the continent to go skiing, longer lasting bike tyres... I'm not knocking any of it, I'm just dubious that it'll make any difference to saving the planet.
Can I ask how much of your working life has been necessary? I'd guess about 20% of mine has been the processing, production and distribution of essentials, maybe another 30% has been slightly beneficial to others. That leaves half of it a waste of effort and resource, giving people what they certainly don't need and probably don't want but have to have because everyone else does. And I've never done much work!