Wing if you honestly believe that, then, you need to stop smoking opium dude...
I've experienced 3 of those countries that were mentioned, the purity of their atmospheres, the high quality of their food produce, and massive protected area's of conserved forestry.
Statistics can be fiddled how ever way you like, HK seems to be making it up as it goes along now...
Baby Boomers, and especially Generation X will not live as long as the pre war generation of HK, with all the food tainting that goes on today, and the noxious air at street level that cannot be escaped. Life was very different 30 -60 years ago, todays elderly had the advantage of reasonably clean environment for bulk majority of their lives.
My generation is going to suffer the consequences, so will generation Y, who will bare the brunt most, due to longer exposure to foods that are pumped full of mainland chinese preservatives, and we can all see the severity of the air quality on a daily basis....