Tuesday, September 16, 2014

What automobiles emit (and walkers breath)

Most motorists will neither care nor give a damn about these facts. Too bad. My daily fitness walks take me right up to the sidewalk vs. street border of the 5 Corners intersection in Essex Junction, Vt. Walkers like me get to breath all this “stuff” as we do our thing, burning calories not a fossil fuel, aka gasoline.

Vehicle emissions are created from the incomplete combustion of gasoline or diesel. Other factors such as emission controls, engine design, and vehicle maintenance may affect vehicle emissions.
Vehicles emit many pollutants into the air, including carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, sulfur oxides, and volatile organic compounds. These pollutants then combine to form secondary pollutants such as fine particulate matter and ozone. While emissions from an individual vehicle may be minimal compared to an industrial source, emissions from many vehicles on the road at one time can have a serious impact on air quality.
Pollutants emitted from vehicles can lead to poor visibility and health problems such as asthma and respiratory illness. Pollutants also can damage buildings and affect the quality of water resources.
Under the Clean Air Act, the US Environmental Protection Agency (EPA) has set protective health-based standards for ozone and other pollutants in the air we breathe. Failure to meet the ozone and other standards over a period of time can result in an area being designated nonattainment by EPA. States strive to achieve attainment with the standards to ensure that public health is protected, promote economic growth, avoid the potential loss of federal highway funding, and preclude the time and cost required to develop and implement plans to re-attain attainment status. Learn more.
The most effective way to reduce emissions from your vehicle is to use it less.
  • Ride the bus, carpool, and share trips to reduce the number of cars emitting pollutants. If possible, choose nonpolluting travel such as walking or biking.
  • Reduce commuting. Choose to live close to your work.
  • Organize a carpool at your work. Call 345-POOL for help.
  • Combine trips to the same areas. Once you arrive, park your car and walk between destinations.
  • Avoid driving during peak traffic hours or in stop-and-go traffic.
All cars emit some pollutants; poorly maintained cars emit the most. A properly tuned car runs better, gets better gas mileage, and pollutes less.
  • Get regular tune-ups. Vehicles with worn spark plugs or clogged fuel or air filters do not run efficiently and emit more pollution.
  • Keep tires properly inflated and wheels aligned to reduce tire drag on the road. Gas mileage drops 1% for every pound below the recommended level of pressure.
  • Do not top off the gas tank. This allows harmful chemicals to escape into the air.
The harder your engine works, the more gas it burns, and the more tailpipe emissions you create.
  • Avoid carrying unneeded items. Each extra 100 pounds increases the amount of gas used by 4%.
  • Place items inside the vehicle instead of on roof racks. Remove roof racks when not in use. The wind drag from a rack increases gas consumption by almost 1 mile per gallon.
  • Drive at a medium speed. Most cars get the best gas mileage between 35 and 45 miles per hour.
  • Drive at a steady speed. Avoid stop-and-go traffic and take it easy on the brake and gas pedals.
  • Use the air conditioner only when necessary. Air conditioners can reduce your gas mileage by 20%.
  • Avoid long idles at drive-up windows or when waiting. Restarting a warm engine takes less fuel than letting it run for just 30 seconds.
  • During hot summer months, fuel vehicles in the evening to facilitate dissipation of volatile organic compounds that contribute to ozone formation.

No comments:

Post a Comment