Aussiegal, I would venture to say that Australia is not "without pollution" as you say as any developed country uses fertilizers and pesticides that are chemically hazardous to our health (my husband's old boss is from New Zealand--she grew up on a farm there--and even today she suffers the effects of chemical poisoning from just being near the fertilizers that were used in the fields her family tended--nothing dodgy or illegal--just the normal chemicals that are used every day to increase output and therefore make more money while throwing the quality and safety of the produce to the wind).
Believe me, if you saw Mainland farms and HK farms, you would see the difference. From my experience, I do believe that those in the organic vegetable association are in it for more than just the short-term--they want a long-term reputation for high quality and standards. That is a big difference between here and the ML--also, these farmers have been at this for generations--sometimes they even own the land they work so it's a whole different deal.
It is easy to take a local tour in HK and see the growing methods (small-scale, family-oriented, using traditional techniques that are hundreds of years old--they water with traditional irrigation and watering cans--very labor intensive actually)--there are tourists walking through our village every weekend checking it out--it's an hour train-ride from the city.
Anyway, yes, HK is polluted compared to the places we come from (and I have spoken and argued at length about this subject on this very forum) but that isn't across-the-board. I think it's really a great experience to go and see for yourself. That's just another option, I guess.
Carang, we're away from home for CNY but after we return, I'll get in touch with the grower I buy from and get his contact info--I just walk over to his house so I've never actually called him--there is also another guy who offers the delivery service and I'll try to get his info. as well--it's always nice to have more options to choose from.