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The upper zone of the ocean is called the ________________ zone.

A lack of iodine in a person’s diet will cause – 

All of the following are freshwater marine ecosystems EXCEPT – 

Methane is about 25 times more effective per molecule than carbon dioxide is at warming the atmosphere.

Because e-cigarettes do not contain the same toxins as regular cigarettes, there is no need to worry about second-hand smoke when vaping.

“Stay at home” orders due to the coronavirus will increase the health risks associated with indoor air pollutants.

Match the major outdoor pollutant with its description.

A psychologist who specializes in children with learning disabilities notes an unusually large number of cases in a nearby rural community. She suspects that this is because the children have been exposed to neurotoxins. What is a neurotoxin? What are some examples of neurotoxins? How might the psychologist determine if her hypothesis is correct?

Taking a hot shower with chlorinated water can produce chloroform, a toxic indoor pollutant.

Because fish farms raise fish in an enclosed and controlled environment, it is safe to eat fish from a fish farm.