Big corporations make a lot of money out of it, and world leaders get to fly their private jets to world economic forums.
By the way, all the green, clear and brown bottles at bottle banks all end up in one great pile, the separating them bit is just to brainwash you into being a subservient citizen. Some areas don't even recycle especially those far from cities.
Those pesky dinosaurs that brought on climate change and the ice age, too much farting!