Many claim that using public transportation has positive effects on the environment How can we avoid pollution using transport? Well, honestly, we can do a lot to save the environment, like reducing greenhouse gas and CO2 emissions with public transportation. Approximately 85 percent of greenhouse gas emissions from the transportation sector are related to the land transportation system. Using public transportation is one of the most effective actions people can take to conserve energy. source Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants. (n.d.). BBC. (n.d.). Introduced species – biodiversity – higher biology revision – BBC Bitesize. BBC News. Retrieved March 19, 2023, from