Table 1. The atmospheric chromium emissions from various sources in China from 1990 to2009.

Source	Emissions (t)	Ratio
Coal combustion	8.93×104	46.6%
Power plants	1.56×104	8.1%
Industrial sector	7.37×104	38.4%
Residential sector	4.00×101	0.02%
Other sector	2.60×101	0.01%
Oil combustion	5.85×104	30.5%
Diesel	4.05×104	21.1%
Kerosene	4.50×103	2.4%
Gasoline	1.34×104	7.0%
Ferrochromium production	1.81×103	0.9%
Iron and steel industry	2.75×104	14.3%
Cement production	1.46×104	7.6%
Waste incineration	8.50×101	0.04%
Total	1.92×105	100.0%