They have six demands. To keep the ban on oil and gas exploration, (fair enough) end the Fast Track Approvals Bill, (understandable) toitū te Tiriti o Waitangi, (had to Google that) climate education for all, (there's no way conspiracy minded persons will freak out about this) lower the voting age to 16 (not really related to the environment) and to "free Palestine". (also not environmentally related.)
So, environmental, plus a bunch of other issues thrown in as well. I don't think having such a grab bag of issues really helps their cause.