Emission Testing
In 1966, the first emission test cycle was enacted in the State of California measuring tailpipe emissions in PPM (parts per million).
Some cities are also using a technology developed by Dr. Donald Stedman of the University of Denver, which uses lasers to detect emissions while vehicles pass by on public roads, thus eliminating the need for owners to go to a test center. Stedman's laser detection of exhaust gases is commonly used in metropolitan areas.
Read more about this topic: Vehicle Emissions Control
Famous quotes containing the words emission and/or testing:
“Approximately 80% of our air pollution stems from hydrocarbons released by vegetation, so let’s not go overboard in setting and enforcing tough emission standards from man-made sources.”
—Ronald Reagan (b. 1911)
“Now I see that going out into the testing ground of men it is the tongue and not the deed that wins the day.”
—Sophocles (497–406/5 B.C.)