Placer mining involves washing metals, minerals, and the gemstones from streambeds with a water cannon.

Answer the following statement true (T) or false (F)


True

Environmental & Atmospheric Sciences

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This North American country has an average population density of around 85

a. United States b. Canada c. Greenland d. Mexico

Environmental & Atmospheric Sciences

A pound of which of the following would have the highest energy content?

A) Gasoline B) Coal C) Lightbulbs D) Wood

Environmental & Atmospheric Sciences

Scrubbers are being used in the U.S. to reduce sulfur dioxide emissions associated with the burning of fossil fuels.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

The primary effect of thermal pollution on aquatic ecosystems is ________

A) lowering the pH of the water B) causing a large increase in plant productivity C) depleting dissolved oxygen D) increased evaporation E) lowering the water table

Environmental & Atmospheric Sciences