| 28-12-2012 |
Letter to the Editor of South China Morning Post - Response to readers' letters on waste charging |
| 22-10-2012 |
Letter to the Editor of South China Morning Post - Response to an article on air pollutants emission inventory |
| 26-09-2012 |
Letter to the Editor of South China Morning Post - Response to reader's letter on air pollution |
| 18-06-2012 |
Letter to the Editor of Oriental Daily News - Response to a report on standards and monitoring of PM2.5 (Chinese only) |
| 02-04-2012 |
Letter to the Editor of SCMP - Response to an article on the development of Integrated Waste Management Facility |
| 23-03-2012 |
Letter to the Editor of SCMP - Response to a letter on the development of Integrated Waste Management Facility |
| 07-03-2012 |
Letter to the Editor of Wall Street Journal - Response to a report on air quality |
