Chevrolet 1970 Owner's Manual page 83

ON THE FOLLOWING THREE PAGES . ..
SOME IMPORTANT FACTS
YOU SHOULD KNOW ABOUT
AIR POLLUTION
CONTROL SYSTEMS
BACKGROUND INFORMATION: During the combus-
tion process in an automotive engine J certain hydrocar-
bons in the fuel fail to burn completely and are dis-
charged into the engine crankcase or exhaust system.
Some carbon monoxide is also formed during the com-
bustion process. This is also discharged into the exhaust
system. On a per-car basis J concentralons of these com-
bustion products are insignificant. Multiplied by millions
of vehicles J however J crankcase and exhaust emissions
combine with pollution products from other sources to
contribute to the total air pollution problem.
General Motors hasJ since the late 1940's, been a leader
in research and development work related to vehicle
emissions J and control systems have been developed
which are highly effective in reducing undesirable crank-
case and exhaust emissions. This work continues at an
accelerated pace.
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All new 1970 Chevrolet passenger cars and trucks com-
ply with all Federal and State laws and regulations for the
Control of Air Pollution from New Motor Vehicles and
New Motor Vehicle Engines.
YOUR ROLE IN CONTROLLING AIR POLLUTION: It
is very important that the engine in your Chevrolet
vehicle be serviced regularly in order to maintain its
efficiency and minimize emissions in normal driving.
The following pages describe the emission control sys-
tems on Chevrolet vehicles, and provide information on
their proper maintenance. By following these recom-
mended maintenance services you will help assure cleaner
air and will provide a better running J longer lasting
engine for greater all-around satisfaction, economy and
performance .