So we should give all developing countries a pass on destroying the habitability of the planet because we used to be as bad ourselves when we didn't know better? While it may be 'fair', I don't think that's sustainable. Even if these countries eventually become 'developed' and start behaving better, there will be new countries that will become 'developed' to take their place, and we'll just keep having these issues over and over until it's too late.

We're already (collectively) fucking the ecosystems and wiping out tons of species of flora and fauna, and making the living situation of billions (and possibly trillions) of life forms on this planet more toxic and less comfortable all in the name of convenience and growth. And it seems like we're on a trajectory of only making things worse in the future.

We need to start doing something about it, the developed countries by being an example and by taking advantage of our desirable trade status by providing incentives (trade, foreign aid, whatever) for developing countries to clean up their act sooner than later.