11.   As Singapore moved to cut unhealthy sulfur emissions, the government defended the country Tuesday against allegations of heavy carbon dioxide pollution.

12.   Singapore will cut sulfur emissions from vehicle and industrial fuel because levels of these unhealthy air pollutants exceed international standards, a newspaper reported Tuesday.

13.   Sulfur emissions are dropping because of the push to reduce acid rain and other surface air pollution.

14.   The country has decided to cut sulfur emissions from diesel, however, because levels of these unhealthy air pollutants exceed international standards.

15.   The study could have important implications for efforts to further restrict sulfur emissions.

16.   This year, the government began experimenting with charging some factories for sulfur emissions.