| the air | 0.32 |
| trigger asthma attacks | 0.43 |
| worsen bronchitis | 0.42 |
| reduce visibility | 0.41 |
| inflame the lining of t… | 0.40 |
| react to sunlight | 0.38 |
| worsen emphysema | 0.38 |
| return to beijing | 0.36 |
| reduce lung function | 0.29 |
| blanket beijing | 0.27 |
| blanket city | 0.27 |
| More » |
| asthma | 0.59 |
| breathing problems | 0.40 |
| eye irritation | 0.33 |
| throat irritation | 0.32 |
| premature death | 0.32 |
| pneumonia | 0.24 |
| cough | 0.16 |
| mobile phones | 0.33 |
| a mix of transport fumes | 0.21 |
| construction dust | 0.21 |
| ozone | 0.29 |
| carbon monoxide | 0.24 |
| sulphur dioxide | 0.24 |
| other carcinogens | 0.16 |
| fog | 0.29 |
| yellowish or blackish f… | 0.21 |
| formed | 0.50 |
| derived | 0.42 |
| formed by a mixture of … | 0.41 |
| caused by air pollution | 0.39 |
| created as nitrogen oxi… | 0.38 |
| created as hydrocarbon | 0.38 |
| localised | 0.29 |
| caused by forest fire | 0.29 |
| blown | 0.21 |