Pollution may be caused by solid wastes.Logical formLearned from4 sentences. A (pollution spill) may be caused by an explosion.Logical formLearned from4 sentences. A (pollution slick) may pertain-to a river.Logical formLearned from4 sentences. A (pollution slick) may move.Logical formLearned from4 sentences. (River pollution) may be confirmed.Logical formLearned from4 sentences. A (pollution control) can be maritime.Logical formLearned from4 sentences. Investment can be in (pollution prevention).Logical formLearned from4 sentences. (Air pollution laws) can be tough.Logical formLearned from4 sentences. (Farm products) may undergo pollution.Logical formLearned from4 sentences. Pollution can be in rural areas.Logical formLearned from4 sentences. Pollution can be on a river.Logical formLearned from4 sentences. (Air pollution) may begin.Logical formLearned from4 sentences. (Radiation pollution) may undergo a prevention.Logical formLearned from4 sentences. A (pollution accident) may occur in a country.Logical formLearned from4 sentences. (Air pollution) can be in an area.Logical formLearned from4 sentences.