The document discusses the issue of haze pollution in China. It notes that haze pollution negatively impacts human health, water, soil, and plants. It can kill thousands of people within a few days through acute poisoning or worsening existing conditions. The pollution also kills microorganisms in the soil, preventing plants from growing properly. The Chinese government has implemented laws and economic policies to curb pollution and promote cleaner production methods. Public participation is also encouraged to address the problem through citizen feedback and urban governance. As a result, haze pollution levels have decreased in Beijing.