@rhys I agree that the term 'eco-populist' is a serious turn-off. When I first saw this in the Guardian I too thought WTF?
I sincerely hope that this descriptor is intended for internal Green Party consumption, rather than as part of the intended Green surge. If it isn't, then, as you imply - the Greens could be consigned back to the wilderness.
The Green Party requires (AIUI) a co-leader, so hopefully it'll be someone with a more media-friendly description on their ballot card.
However - while I know nothing else about Zack, he at least recognises that Green campaigning has been too timid, and sees tgst this needs to change.
I have my fingers crossed!