(Water pollution problems) can be in a country.Logical formLearned from6 sentences. Generators may create pollution.Logical formLearned from6 sentences. (Mercury pollution) can be on island.Logical formLearned from6 sentences. Scientists may document (mercury pollution).Logical formLearned from6 sentences. A (pollution level) may pertain-to a world-city.Logical formLearned from6 sentences. (Air pollution levels) can be hazardous.Logical formLearned from6 sentences. An (air pollution) can be in cities.Logical formLearned from6 sentences. A (pollution crisis) may start.Logical formLearned from6 sentences. An (air pollution) may worsen.Logical formLearned from6 sentences. (Pollution levels) can be unhealthy.Logical formLearned from6 sentences. (Air pollution readings) may soar.Logical formLearned from6 sentences. An increase can be in an (air pollution).Logical formLearned from6 sentences. (Pollution problems) can be in a city.Logical formLearned from6 sentences. Persons may have (pollution problems).Logical formLearned from6 sentences. Diseases may be caused by environmental pollution.Logical formLearned from6 sentences.