Gains in Railroad Productivity Were Caused by

question 1

Multiple Choice

Gains in railroad productivity were caused by

• A) more powerful locomotives.
• B) automatic couplers.
• C) air brakes.
• D) All of the above are correct.
• E) Only a and b are correct.

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Definitions:

Coal Mine Pollution

Environmental contamination resulting from the extraction and processing of coal, including air and water pollution.

Catalytic Converters

Devices incorporated in the exhaust system of vehicles that reduce harmful emissions by converting pollutants into less harmful substances.

Internalization of Externalities

Refers to actions taken to incorporate the external costs or benefits of a good or service into the price paid by the consumers or producers.

Sewage-Treatment Plant

A facility designed to receive the wastewater from domestic, commercial, and industrial sources and to remove materials that damage water quality and threaten public health and safety.