Which two fuels are currently used at about equal levels in the United States?

A) Water power and nuclear power
B) Coal and natural gas
C) Coal and oil
D) Oil and natural gas


B

Environmental & Atmospheric Sciences

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A pulley system is capable of

A. multiplying a force. B. changing the direction of a force. C. both of these D. none of the above

Environmental & Atmospheric Sciences

Mexico City has recently improved its air quality

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The difference between the cost to produce a commodity and its price in the marketplace is ________

A) profit B) opportunity cost C) discount rate D) economic value E) economy of scale

Environmental & Atmospheric Sciences

A ________ grid communicates between users and utilities to increase energy efficiency

A) green B) renewable C) metered D) power E) smart

Environmental & Atmospheric Sciences