[louislouis]

I've been in HK for the past 2.5 years. The air isn't too bad. For example today, sunny and clear skies. I think it would only have a measurable effect on health if you were to live here 30+ years. I would say in any given week, maybe 1-2 days it's slightly smoggy here.

Singapore is a good choice though. I've also considered it. Some may complain about the hot/humid tropical climate all year round but I like that. It's also the most racially diverse country I've visited. Given your wife is Indian she will have an easier time settling in there than in HK where it's predominantly Chinese but with a huge expat crowd on the island side. Cantonese is not necessary here, you could get by without a single word really as most people speak English and Mandarin here. There is probably more chance of getting some Mandarin practice in too than in SG where they speak a variety of Chinese dialects.