EMISSIONS AND TIER 4 EMISSIONS & IT4


CLEAN AIR ACT 19 94-2010


London’s Killer Fog A toxic mix of fog and coal smoke kills several thousand over a four-day span. The world changes its view of air pollution.


Donora, Pa. For fi ve days, a cloud of air pollution overtakes the industrial town of Donora, Pennsylvania, sickening 40% of the town. 20 die.


19 48


The Air Pollution Control Act of 1955 identifi es air pollution as a national problem and provides funding for air quality improvement.


19 55 19 63


The Clean Air Act of 1963 sets emission standards for stationary sources (power plants, steel mills, etc.) and recognizes the danger of motor vehicle exhaust.


19 70


Emission standards broaden and become more stringent for auto- mobiles and stationary sources, such as factories. Congress creates the EPA in part to assist with the implementation of these expanded standards.


19 52


The Motor Vehicle Pollution Act sets the fi rst emission reduction standards for automobiles.


19 65 19 75


As a result of emission standards set in 1970, catalytic converters begin to appear on automobile exhaust systems.


Cars and light trucks begin and complete an emission reduction process. The end result is comparable to what Tier 4 will be for compact equipment.


EARTH DAY


TIMELINE 1998-2015


Compact equipment evolves to meet tiered emission standards, with Tier 4 being the fi nal step in this process.


1987-2010


Heavy-duty trucks and buses begin and complete an emission reduction process. The end result is comparable to what Tier 4 will be for compact equipment.


The fi rst Earth Day


The fi rst Earth Day was celebrated on April 22, 1970, after U.S. Senator Gaylord Nelson from Wisconsin encouraged Americans to have a better understanding of the environment and the threats it faced from pollution. Today more than 175 countries celebrate Earth Day on April 22.


WORKSAVER BobCatalog 2011 5


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54