How does the subway pollute?

Answer 1

Subways primarily contribute to pollution through the energy sources used to power them, especially if the electricity comes from fossil fuels. Additionally, the construction and maintenance of subway systems can release dust and particulate matter into the air. While subways are generally more environmentally friendly than cars, they still have a footprint due to emissions from trains, ventilation systems, and ancillary operations. Noise pollution is also a concern, affecting urban environments and wildlife.