The Housing Authority grew more than 600,000 plants and upgraded 110,000 square metres of greenery in its public housing estates last year.

According to the authority's Sustainability Report 2006-07, more than 5,000 trees, about 590,000 shrubs and 52,000 annuals were planted in the estates.

Substantial improvement was also made in water saving and waste reduction. Installation of water-saving facilities in public housing estates has reduced water consumption by about 6.2% when compared with 2005-06.

Water recycling systems implemented in 21 building contracts have resulted in a reduction of water usage of approximately 21% compared to 2005-06.

On waste management, the authority encouraged the use of long-lasting and easily maintained building materials. It implemented the waste separation at source scheme at 60 housing estates. 

Implementation of safety measures in the authority's construction sites and maintenance works has achieved good safety record. The accident rate of its new construction sites dropped from 55.8 per 1,000 workers in 2001 to 11.5 in 2006. The rate is lower than the average 64.3 of the local construction industry.