Yeah sure, those big evil environmental groups that want to ensure smart use of natural resources, with their grandmother volunteers are repressing the entire third world.
You don't suppose it might have to do with IMF loans making debt slaves out of entire counties? Or the fact that certain developed nations meddle in the affairs of third world countries and destabilize them or prevent them from developing certain technologies? Or that it is caused by dictatorships in those countries? Or the systemic corruption and in-fighting/wars? Or all of the above and more?
If you really think about it, a nation's wealth ultimately comes from its natural resources. If there are none, the country has little to use/trade/sell to develop their industrial infrastructure and educate its citizens. What's left to offer? The cheap labour force. Combined with all the above, you have what many would call a third world country.
But in your view, hey, let's get those "oppressive" environmentalists (who advocate not wasting reources) out of the way and allow unfettered industrialization to occur, and wreck/waste/plunder that small amount of natural capital, rather than using it smartly. And using it smartly often means using the LATEST technology. So no, it's not environmentalists keeping anyone down.