| pollution be | 11.65 | Pollution was second. | ||
| pollution cause | 2.30 | Pollution caused the soil to acidify. | ||
| pollution come | 0.99 | The pollution comes with a price. | ||
| pollution reach | 0.79 | Last October pollution reached record levels. | ||
| pollution have | 0.66 | Pollution is having a bad effect on fish stocks. | ||
| pollution threaten | 0.66 | It is also threatened by pollution. | ||
| pollution worsen | 0.59 | Pollution is worsening. | ||
| pollution affect | 0.53 | Pollution is affecting many creatures lower down the food chain. | ||
| pollution make | 0.53 | Far more important, they said, the pollution makes it harder for people to breathe. | ||
| pollution control | 0.46 | New pollution controls on trucks and protection of coral reefs. | ||
| pollution get | 0.46 | The air pollution gets so bad on some days that health advisories are posted at park entrances. | ||
| pollution damage | 0.39 | The fish stock already has been damaged by pollution. | ||
| pollution destroy | 0.39 | Shrimp farm pollution is destroying many coastal wetlands in Asia. | ||
| pollution pose | 0.39 | Pollution poses a threat to fish. | ||
| pollution seem | 0.39 | Even the onshore pollution seems normal. | ||
| pollution become | 0.33 | Air pollution has become one of the most significant health problems of our time. | ||
| pollution contaminate | 0.33 | If some have been contaminated by pollution, where does the water end up? | ||
| pollution contribute | 0.33 | Air pollution contributes to lung disease, including respiratory tract infections, asthma and lung cancer. | ||
| pollution harm | 0.33 | In addition to poaching, pollution has harmed the fish, he said. | ||
| pollution increase | 0.33 | Air pollution will have increased fourfold and the roads will be jammed with traffic. |