Land, Water, and Air Pollution

Water moves continually between the atmosphere and Earth's surface in the process called

• global warming.
• water pollution.
• temperature inversion.
• the water cycle.

Most of the Earth's water (about 97 percent) is

• salt water in the oceans.
• freshwater in lakes and rivers.
• in the form of snow or ice.
• in the clouds.

Many uses of land, including logging, mining, and farming, expose the soil, which can lead to

• erosion.
• nutrient depletion.
• crop rotation.
• development.

Many types of hazardous waste can be disposed of

• in an open dump.
• in a carefully designed landfill.
• in a sanitary landfill.
• down the drain.

Most water pollution is the result of

• human activities.
• drought.
• volcanic eruptions.
• storms.

The ozone layer protects people from which of the following?

• carbon monoxide poisoning
• too much ultraviolet radiation
• the effects of radon
• surfing

You should not use a charcoal grill indoors, because

• charcoal contains radon.
• burning causes nutrient depletion.
• burning charcoal causes acid rain.
• burning produces carbon monoxide.

Which indoor air pollutant is a colorless, odorless gas that forms when wood, coal, oil, or gas are incompletely burned? 

• ozone
• smog
• carbon dioxide
• carbon monoxide

One group of gases that is responsible for destroying ozone in the ozone layer is

• car exhaust fumes
• CFCs
• nitrogen oxides and sulfur oxides
• carbon monoxide and carbon dioxide

The Clean Air Act has resulted in the development of many new types of ___________ to control air pollution.

• recycling
• factories
• technology
• landfills