Worries can be about pollution.Logical formLearned from11 sentences. (Air pollution problems) may pertain-to a city.Logical formLearned from11 sentences. A forecast may be impeded by concerns of contributions to (air pollution).Logical formLearned from11 sentences. Stone may absorb pollution.Logical formLearned from11 sentences. Conditions can be tough with pollution.Logical formLearned from11 sentences. (Pollution permits) may undergo a trading.Logical formLearned from11 sentences. Pollution can be in cities.Logical formLearned from11 sentences. Trucks can be a source of pollution.Logical formLearned from11 sentences. A (drinking water) may undergo pollution.Logical formLearned from11 sentences. Forms can be constituted-of-or-filled-with (water pollution).Logical formLearned from11 sentences. A study can be constituted-of-or-filled-with (air pollution).Logical formLearned from11 sentences. Solutions can be to (pollution problems).Logical formLearned from11 sentences. Warnings can be about pollution.Logical formLearned from11 sentences. (Air pollution) can be bad in a world-city.Logical formLearned from11 sentences. A report can be on (air pollution).Logical formLearned from11 sentences.