The skater rollerbladed five times back-and-forth Sha Tin and Tai Po. He completed each leg in about an hour with a 10-minute rest between each. 'I took a rest after each skate, except for the last one where I knew if I stopped I would not be able to get started again,' he said.

The purpose of the activity was partly to give the skater an idea of how far 110 km is, but more importantly, to raise money for two local charities - Crossroads International and Clear The Air.

The skater said he is concerned about Hong Kong's air pollution.

He feels that the government is not doing enough to help and wants to support an organisation (Clear The Air) that's trying to do something about it.

'[People] are far too dependent on powered transport, the cost of which is kept artificially low.

A combination of human-powered transport (walking, cycling and skating) mixed with public transport could go a long way in relieving environment problems,' Parker said.

The skater felt a mix of joy and exhaustion after completing his mission, but he was having breathing problems, which he felt might have been caused by the polluted air.

He recovered quickly, however, and was soon able to play competitive inline hockey.

Four other people joined Parker on the course. Two skated 22 km, one 40 km, and another joined him on a bicycle for 70 km.

So far, HK$16,000 has been raised. The total is expected to reach HK$20,000.

The skater felt that his message had not reached a sufficient number of people so he intends to attempt another one-day skate covering 200 km from Hong Kong to Guangzhou over Chinese New Year with a friend.

'I think the message was noticed by a few in the community, but, in general, not enough people are willing to question what's happening around them,' he said.