Pollution Review

What is water pollution?

• The process of cleaning water to make it suitable for drinking

• The natural filtration of water through soil

• Any chemical, biological, or physical change in water quality that harms living organisms or makes water unsuitable for desired uses

• The increase of water levels in rivers and lakes due to rainfall

Approximately how many people worldwide drink contaminated water that could be harmful to their health?

• 500 million

• 1 billion

• 2 billion

• 3 billion

What is point-source pollution in the context of water pollution?

• Pollution that comes from a diffuse area such as an entire farming region

• Pollution that originates from a single identifiable source, such as a factory

• Pollution that is filtered through natural processes before entering water bodies

• Pollution that occurs due to natural phenomena like volcanic eruptions

Which example best illustrates nonpoint-source pollution?

• Waste discharge from a specific wastewater treatment plant

• Oil leaking from a single tanker accident in the ocean

• Runoff from urban areas carrying various pollutants

• A chemical spill at a single manufacturing facility

What is a non-point source of pollution?

• Pollution that is emitted from a single, identifiable source.

• Pollution that occurs from multiple sources with no single polluter identified.

• Pollution that is controlled through governmental regulations only.

• Pollution that naturally occurs in the environment without human influence.

Which type of pollution remains a problem despite the reduction in point-source pollution?

• Air pollution

• Noise pollution

• Nonpoint source pollution

• Light pollution

What is a major source of stream pollution in developing countries?

• Agricultural runoff

• Discharges of untreated sewage and industrial wastes

• Plastic waste

• Oil spills

What is the major source of water pollution according to the EPA?

• Industrial Facilities

• Municipal Sources

• Mining

• Agriculture

Which of the following is NOT a common pollutant of water?

• Disease-causing agents

• Oxygen demanding waste

• Plant nutrients

• Clean air

What type of waste increases the biological oxygen demand in water bodies?

• Sediment

• Oxygen demanding waste

• Inorganic chemicals

• Temperature