Which of the following is NOT considered pollution?

Pollution that comes from many sources rather than from a single, specific site is considered.

If you find no insects at all in a pond or stream, what can you conclude?

Toxins pass from tissues in one organism to another through a food chain/web. This is called ___.

Waste matter that contaminates the water or air or soil.

Humans are ingesting plastic that has ended up in the ocean. How is this possible?

Pollutants are introduced into surface or ground water without a specific location source. This is considered ___ pollution.

A factory dumps extremely hot water into a river. This changes the amount of dissolved oxygen available to living things in the river. How would this pollution be classified?

If you collect pond water to measure the pH level with a pH meter, this is considered a(n) ___ measurement.

Pollution in the Los Angeles Basin, CA, USA due to the exhaust from daily car commuters is considered ___.

The Fukushima Daiichi nuclear power plant disaster in Japan is considered ___.

The release of methylmercury in the industrial wastewater from Chisso Corporation's chemical factory (pollution continued from 1932 to 1968) put mercury at the bottom of Minimata Bay, Japan. Bottom dwelling shellfish had high mercury levels and people eating the shellfish got sick from mercury poisoning. The mercury passing from the shellfish to humans is an example of ___.

Carbon monoxide (CO) is a pollutant when it is emitted. This is an example of ___.

Acid rain (sulfuric acid, H₂SO₄) forms after sulfur trioxide (SO₃) reacts with water (H₂O). This is an example of ___.

Some pollutants, such as sewage or soap molecules, can be broken down by decomposers or physical processes (such as sunlight or heat). These pollutants are considered ___.

Changing human activity to stop pollution before it occurs, regulating or preventing the release of pollutants, and cleaning up or restoring damaged ecosystems are types of ___.