It is proposed that the wind farm should be 9km east of Clearwater Bay peninsula, 5km east of [East] Ninepin Island and 3km south of Basalt Island - which coincides with the boundary of the proposed geopark. The seabed of this area is home to invaluable geological heritage - the world's largest acidic hexagonal columnar rocks.

At present, there is nowhere else with a coverage of over 100km and an average diameter of 1.2 metres. It is unique.

The laying of foundation works, undersea electrical cables and turbines, and the onshore activities and grid connections, would cause serious damage. The appearance of up to 67 135-metre-high turbines arranged in a grid and the offshore transformer platform would affect the coastal features.

This is the only geological site among our eight geo sites that remains intact, with no human interference and construction. The construction of the wind farm would definitely undermine the geopark's global significance.

Low efficiency is another factor to consider. Annually, the wind-farm project would provide only 1 per cent of Hong Kong's electricity. So how can anyone justify pursuing such a project? The association supports efforts to improve air quality and to achieve the renewable energy targets. But this should not be done by damaging geological heritage.

Cindy Choi Mo-ching, Association for Geoconservation

Should pet shop regulations be tightened?

The fact that the government is killing dogs and cats clearly shows there needs to be something done on supply.

You cannot resolve the problem of unwanted animals by just killing them, which boiled down is the Agriculture, Fisheries and Conservation Department's prescription. If you do not clamp down on supply, this issue will go on indefinitely.

Hong Kong needs a much more enhanced trap, neuter and return programme, strict limits on imports to prevent a proliferation of unsuitable breeds and stronger controls over breeding. The city needs to reclassify animals, which are now legally considered in the same class as a handbag or shoes - personal property.

I am glad the South China Morning Post carried the telling story ('Government admits killing 10,000 dogs a year as pet trade comes under the spotlight', June 10). And I was surprised to see on page C2 on the same day a promo ('Paradise for pet lovers') that said: 'Whether looking to buy or board a pet, adopt, locate a vet or simply pamper your bundle of fur, you'll find all the answers in a new PETS section.'

No one should be encouraged to buy a pet. There are thousands of animals that need homes, waiting for you at the many shelters.

Bernard Lo, Mid-Levels

Should schools test pupils for drugs?

I think it is high time schools tested pupils for drugs. Pupils are given too much protection. Teachers nowadays cannot resort to corporal punishment, although they were able to use it for decades.

Now we have people saying that testing pupils for drugs may infringe their privacy. If we do not take action now, the youth drug problem will get worse and it will become more difficult to deal with.

Gary Ko, Kwai Chung

On other matters...

Government officials in need of a quick fix to problems have long been in the habit of dumping them on South Lantau.

South Lantau is designated for recreation and conservation, but there are already seven correctional facilities on prime scenic coastline, an ugly high-explosives depot, and the radioactive waste bin on the Sokos.

Recently, the worst ideas for further despoliation have been successfully resisted by residents' groups, such as the proposal to fill the bay in front of Mui Wo with a 'super-prison' on reclaimed land. CLP Power's plan for a gas plant has been seen off. There is also the threat of a waste incinerator opposite Cheung Sha beach. The latest really bad idea is to convert the former Mui Wo secondary school into a drug rehabilitation centre.

We are a tight-knit community, perhaps one of the poorer economically in Hong Kong, though things have been looking up recently as the number of young families has been on the increase, in part due to the financial crisis, but for most because of the affordable healthy lifestyle on offer. As a result, a vibrant, cosmopolitan community is developing.

Residents of all backgrounds were 100 per cent united in opposition to the proposal at Sunday's forum ('Security chief appeals to Mui Wo to support college for addicts', June 9). This is not because of a lack of sympathy for the families of drug abusers, but because the government is undermining efforts to revitalise our area.

The fact that there are no secondary schools in South Lantau and that applications to take over the former Mui Wo school have been rebuffed by the Education Bureau is sending a very clear message that the government views South Lantau as a gulag archipelago rather than as a normal community with its own educational and economic needs.

No wonder the community is unanimous in its rejection of Secretary for Security Ambrose Lee Siu-kwong's call for us to accept this bad idea.

John Schofield, Living Islands Movement