Greener cars have improved L.A. air quality(Read article summary)
Smog-producing compounds in Los Angeles are down 98 percent since the 1960s. They're down by half just since 2002, thanks to higher-mileage cars.
Bruce Chambers/Orange County Register/AP/File
Given the length of time theÂ U.S. Government is taking to set new gas mileage standards for 2025,youâ€™d be forgiven for thinking the only benefit from driving a high gas-mileageÂ carÂ is the savings you make at the pump.
Youâ€™d be wrong.
Driving high gas mileage cars equates to lower tailpipe emissions, less air pollution, and a healthier population.
And now thereâ€™s data to prove it.Â
According to theÂ latest studyÂ from the National Oceanographic and Atmospheric Administration (NOAA) -- (viaÂ TreeHugger) -- air pollution from car exhausts is down by 98 percent compared to the 1960s.
Although gasoline use in LA is almost triple that of what it was in the 1960s, the amount of volatile organic compounds (VOCs) in the air has dropped from around 100 parts per billion to just 2 parts per billion.Â
Between 2002 and 2010 alone, the amount of VOCs in the air of LA halved.Â
Of course, VOCs arenâ€™t the only pollution to come from an exhaust.
As the study points out, however, VOCs are a major cause of ground-level ozone, which not only causes smog, but can cause respiratory diseases.Â
Since its enactment in 1963, the Environmental Protection Agencyâ€™s Clean Air Act, and its various amendments, has tackled airÂ quality, legislating on emissions from everything from factories to airplanes and the automotive industry.
As data from the NOAA attests, the period between the mid 1970s and early 1980s saw a steady, marked drop in VOCs measured in the air of Los Angeles.Â
Of course, California doesnâ€™t just have the EPA to thank for an improvement in air quality.Â
The Californian Air Resources Board, set up in the late 1960s, has played a large part in improving Los Angelesâ€™ air quality, through the implementation of even tougher air quality standards.Â
Among them, stricter emissions targets for automakers, and mandates that mean automaker who want to sell cars in the state have to produce a specific percentage of low and zero-emission cars.Â
The results are clear to see.Â
â€śRequirements for catalytic converters, use of reformed fuels less prone to evaporate, and improved engine efficiency of new vehicles have all likely contributed to overall declines in vehicle-related pollution, including VOCs,â€ť the NOAA says in its study.Â
Thereâ€™s more good news too.Â
Even though the number of cars in Los Angeles continues to climb, perpetuating the cityâ€™s image as one of the most congested places in the U.S., gasoline use in LA has started to fall, after hitting a peak around 2008.
Thatâ€™s a clear indicator that people are driving less, and buying the cleanest, mostÂ efficientÂ cars ever.Â
So next time you look at a new car remember this: the higher your carâ€™s gas mileage, and the lower its tailpipe emissions, the more easily you -- and your family -- will be able to breathe.Â