While not directly attributable, many more deaths are resultant from dangerous emissions from coal plants. Chronic obstructive pulmonary disease (COPD), linked to exposure to fine particulates, SO2, and cigarette smoke among other factors, accounted for 26% of all deaths in China in 1988.[55] A report by the World Bank in cooperation with the Chinese government found that about 750,000 people die prematurely in China each year from air pollution. Later, the government asked the researchers to soften the conclusions.[56]