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In old and gold times, you had the trains that ran on steam engines. They used to pollute a lot, when coal was burned. But then the number of trains were very less and pollution was not a great problem. Now every body is running after material things. People travel a lot and the number of trains has increased to high level. Diesel trains pollute the air to fairly large extent. Trains running on electricity do not pollute the air directly. But then the air is already polluted when the electricity was generated.
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∙ 9y ago
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