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The United Nations Sustainable Development Goals have highlighted the challenge posed by increasing air pollution. This study allocates PM 2.5  footprint to household consumption expenditure based on multi-regional input–output model and survey data collected from 30 000 households. The household indirect PM 2.5  footprint related to spending on food, hospital, electricity, and education rank as the top four items, plus direct PM 2.5  emissions, which in combination contribute more than 55% of total air pollution. Compared with the poor, the responsibilities for air pollution on the wealthy are more sensitive to changes in income, especially for high-end consumption categories, such as luxury goods and services, education and healthcare. Further, the wealthiest 20% of households cause 1.5 times the PM 2.5  footprint per capita than exposure to PM 2.5  emissions. The high-footprint household samples are concentrated in high-exposure areas. It is recommended that mitigation policies address inequality of PM 2.5  footprint by targeting the top 20% of footprint groups with tags of wealthy, urban resident, well-educated, small family, and apartment living.

Inequality of household consumption and PM2.5 footprint across socioeconomic groups in China

Inequality of household consumption and PM_2.5 footprint across socioeconomic groups in China