Building a mass transit system is likely to have which of the following effects? increasing air pollution traffic congestion increasing the temperature of the urban heat island none of the above

The correct answer should be none of the above

It would actually help in reduction of air pollution since fewer cars would be used and other vehicles that harm the environment since more people would be using the mass transit. Traffic congestion would also be reduced for the same reason, fewer cars fewer problems. Temperature of the urban heat would also be reduced for absolutely the same reason.