Do you think that the UN and the rest of the world for that matter should do something to force China to clean up and stop being such a horrid polluter?

I was reading National Geographic the other day and was shocked and horrified to see how bad of shape their country is in. The air is aweful, the water will cause serious illness or death in over 80% of the country, and then it gets bad. What do you think the rest of the world should do? How do you think China would react? Would they try to fight everyone? How can they be forced to change?