Fuel cell vehicles are very attractive from an emissions standpoint. For detailed results from Georgetown's tests, skip down to the Fuel Cell Emissions section. Or, read some background information on vehicle emissions in our Emissions Summary .
Motor vehicles are the largest contributors to air pollution in the United States.
Many efforts to reduce transportation emissions are underway, including improvements in mass transit options, improvements in vehicle fuel economy, and use of alternative fuel vehicles. Because fuel cells operate with extremely low emissions, they are the most attractive power source for future transportation applications. There are a number of chemicals and materials classified as air pollutants. NO is a colorless, tasteless, and odorless gas that gradually transforms into NO 2 in air. NO 2 is a reddish-brown poisonous gas with a strong odor that can cause lung irritation and respiratory problems.