Section 4.4 of textbook (pp. 113 – 116)

 The United States comprises 6% of the world’s population…  But uses about 30% of the world’s resources  And produces about 1 / 3 of the world’s garbage

 Careful use of resources

point source pollution  Requires industries to reduce or eliminate point source pollution into surface waters. sewage treatment plants  Led to an increase in the number of sewage treatment plants which eliminated the discharge of raw sewage.

 NAAQS for 6 pollutants (carbon monoxide, ozone, lead, sulfur dioxide, nitrogen oxides, and particulates)  Energy conservation is an important air pollution control strategy.

farmers plow across the contours of hillsides, resulting in decreased water runoff  Contour plowing: farmers plow across the contours of hillsides, resulting in decreased water runoff crops with different nutrient requirements are planted in adjacent rows, helping preserve the fertility of soil  Strip cropping: crops with different nutrient requirements are planted in adjacent rows, helping preserve the fertility of soil

partly decomposed organic material that is used as fertilizer  Compost: partly decomposed organic material that is used as fertilizer uses natural predators or mechanical processes to decrease the number of pests  Integrated Pest Management: uses natural predators or mechanical processes to decrease the number of pests

 Decreased the illegal and unsafe dumping of hazardous waste  Companies must store, transport, and dispose of hazardous waste according to strict guidelines