Human Impact #2

Which of the following is an example of a nonpoint source of fresh water pollution? 

• leaking toxic landfill
• pesticide runoff from a farm
• factory pipe waste into a stream
• sewage treatment plant

What amount of Earth’s total water supply is usable fresh water?

• 25%
• less than 1%
• 75%
• 15%

What is the function of the atmosphere’s ozone layer?

• shields Earth from UV rays
• protects Earth from the Sun's heat
• removes pollution from the atmosphere
• provides oxygen we need to live

Which of the following is not a land resource?

• iron
• wind
• forests
• soil

One way that mining for mineral resources damages the land is by ____.

• increasing soil erosion
• causing salinization
• depleting ozone
• adding greenhouse gases

In which decade were the first important laws passed to decrease water pollution?

• 1950s
• 1960s
• 1970s
• 1980s

The Clean Water Act ____. 

• required pollution control devices on cars and power plants
• established Air Quality Standards
• set max contaminant levels for air pollutants
• required industries to reduce point source pollution nto drinking water

What is the most important law passed to deal with air pollution?

• Clean Water Act
• Clean Air Act
• Resource Conservation and Recovery Act
• The Treaty of 1912

Compost helps preserve the health of soil because it ____.

• is a natural fertilizer
• contains pesticides that kills insects
• breaks rock down into soil
• adds artificial fertilizers that help plants grow

The Resource Conservation and Recovery Act of 1976 has resulted in ____.

• a decrease in recycling
• an increase in compost use
• decrease in fossil fuel use
• a decrease in illegal dumping of hazardous waste