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Pollution
/pəlˈuːʃən/
/pəˈɫuʃən/
Esempio
1. Pollution is a major threat to our environment.
2. Environmentalists study the impact of pollution on different types of ecosystems.
3. The politician's off-the-cuff remark about pollution stirred up a hornet's nest among environmentalists.
4. We must protect the environment against pollution.
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