Look at HKE's website for info about the plant:
https://www.hkelectric.com/en/our-opera ... generationhttps://www.hkelectric.com/en/MediaReso ... S_2014.pdf : page 12 "Comprehensive Environmental Protection Measures"
The air on Lamma is better than 90% of Hong Kong. Stand on a hilltop and you can see the brown smog over HK Island and Kowloon.
The worst air pollution in HK is from vehicles: cars, trucks, buses, ships.
We have a dozen village vehicles. The only private transport on Lamma is by bicycle.
If you want pure clean air; don't live in Hong Kong. Seriously, a lot of people are leaving because of that. But if you must live here, Lamma is one of the healthiest places.