unfortuantly one of the side affects of a huge economy is pollution, America, China, and India all have this problem. We to some degree are responsible because we can afford Green Tech whereas citizens in many countries cannot.
I do agree that other countries do need to step up and do somethings as well, even if its small efforts.
Keep in mind that modern OBD and emissions have some actual benefits in other areas, such as a perfomance and refinement. The modern Toyota Avalon V6 in terms of acceleration would leave almost any 70's era V-8 family car far behind (0-60 in 6.1 seconds) and do so getting close to 30MPG and in near silence (I have driven one of these).