Mike has to go to work every day. In order to reduce greenhouse gas emissions. He should use ______ for traveling.

The correct answer is: A bus

• By forgoing travel that would have otherwise been made in a private vehicle, people who choose to use public transit minimize their carbon footprint and save energy. As a result, fewer car miles are driven and fewer pollutants are produced.
• A single person can cut their annual CO2 emissions by 4,800 pounds per year by switching from a 20-mile roundtrip commute to existing public transportation. This is equivalent to a 10% decrease in all greenhouse gas emissions from a normal two-adult, two-car household.
• Up to 30% of carbon dioxide emissions can be saved by ditching one automobile and using public transit instead of driving.