A radioactive pollution can be strong.Logical formLearned from4 sentences. International conference may focuse on problems of (ocean pollution).Logical formLearned from4 sentences. A male may call for attacking (air pollution).Logical formLearned from4 sentences. Pollution may spread to a region.Logical formLearned from4 sentences. Illness may be caused by an (air pollution).Logical formLearned from4 sentences. Pollution may be swept under a carpet.Logical formLearned from4 sentences. (Car exhaust) may account for some percent of pollution.Logical formLearned from4 sentences. Pollution may become a problem.Logical formLearned from4 sentences. Pollution can be combined.Logical formLearned from4 sentences. Areas can be constituted-of-or-filled-with (pollution control).Logical formLearned from4 sentences. (Pollution levels) can be with alkali.Logical formLearned from4 sentences. Pollution can be visible.Logical formLearned from4 sentences. Pollution may pose a (health hazard).Logical formLearned from4 sentences. (Ash pollution) can be weak.Logical formLearned from4 sentences. A price can be for (carbon pollution).Logical formLearned from4 sentences.