China's air pollution is one of the worst in the world:
- leader in sulfur emissions
- second largest producer of greenhouse gases
- China ranks 94 out of 133 countries listed in the Environmental Performance Index (Yale University).
70% if Chinese monitored cities are moderately to severely polluted (they don't meet the World Health Organization standards).
33% of urban dwellers breathe toxic air, equivalent to smoking two packs of cigarettes a day.
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