What is a negative effect of railways?
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# Pollution
Which country has the worst air quality?
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Does 25% of all ocean waste come from cruise ships?
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What city in the world has the worst air pollution?
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What are the most common pollution items?
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What are the top 3 most air polluted cities in the world?
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Who is the biggest polluter of all time?
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Which of the following causes the least pollution when burned?
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Which form of transport is the most polluting?
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What is the biggest contributor to pollution?
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