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)
“Today so much rebellion is aimless and demoralizing precisely because children have no values to challenge. Teenage rebellion is a testing process in which young people try out various values in order to make them their own. But during those years of trial, error, embarrassment, a child needs family standards to fall back on, reliable habits of thought and feeling that provide security and protection.”
—Neil Kurshan (20th century)