Plus what I love about the Onceler is that he actually loves the Truffula trees. He's not just some one dimensional greedy villain, he has layers which allows him to feel guilt in the end.
I watched the special recently, and the Lorax almost comes off as a jerk (or rather a "GIT OFFA MAH LAWN!!" type) when he first shows up, shouting at the Onceler to leave the trees alone, when the Onceler just gently picked the tree tufts and hand knitted one Thneed. You almost feel like saying, "HEY! Relax. The guy's just trying to create something." But at that point, there could have been compromising on the part of both of them. Two trees planted for every tree plucked (though I wonder how the story would have been affected if Seuss gave the explanation that said trees either grow a new tuft or not)... yet a plucked tree would be left still.
It's the Onceler's lazy, cut rate methods that do everyone in... polluting factories, massive deforestation, building a populous for those to live closer to work...
that's where he goes wrong. If anything, both the environment and progress can co-exist with the slightest bit extra of effort. Especially at the end, the all too familiar "there's no work left" abandonment of an entire town. In the end, all that's left is a polluted, worthless, baron, ghost town that needn't have been if extra steps have been taken. Gently plucking some of the trees, shipping those tufts to another site (like a previously abandoned factory that's been refurbished), being mindful of the creatures habitats, letting more trees grow... nature is left relatively untouched, your source of income is renewable, so you have a steady stream of income and work coming in. It may have cost a little more in the short run, but in the long run, it pays for itself. But everything is about the get rich quick schemes, the short term profits at the risk of long term disasters... that's why most companies are screwed up.
If I were to have made this film, instead of that useless bit of some kid trying to get a girl to like him, I'd've added more allegories of why our system of capitalism
is so screwed up... I'd have the Onceler bought out for a small fortune, having the entire operation shipped off to be outsourced to Foomaphazoom where the Phazooms all live in one room, spending most of their profit on PR to make it look like everything they do is great, and lobbyists to make sure they can keep doing what they're doing, then filing for bankruptcy after a massive scandal and punishing everyone under the CEO and stock holders... all leading to the Onceler living alone, imprisoned in the wasteland remains. THAT'S the message we need besides the environmentalist message... that is
greedy stupid people run big business when they're incapable to run a 2k.