The amount of gadgets and other miscellaneous items he has tells me otherwise. Also, how is he powering all of that? I don't see any solar panels or wind turbines close to his cave on the top of that mountain.
E: Pretty sure powering it all with dog power leaves a bigger carbon footprint than a generator.
Carbon footprints require fossil fuels. Burning wood is carbon neutral and if he and the dog are hunting or gathering, they'd be doing in a sustainable way just by happenstance.
He should move further away. The grinch was not their neighbor, he was literally living off their trash! Damn freeloader, living off the hard work of the Who's /s