Examlex
Drinking is the biggest use of water in the United States.
Frontier
The edge of a settled area, or the boundary between the known and unknown, often associated with westward expansion in American history.
Railroads
Systems of tracks along which trains run, a major form of transportation for both goods and passengers, historically significant in the development and expansion of countries.
Development
The process of economic growth, expansion, or realization of social and cultural potential within a country or region.
Railroad Industry
The sector of the economy focused on the construction, operation, and maintenance of railways for the transport of goods and passengers.
Q8: What is the most efficient form of
Q24: Where is most of the ozone layer
Q34: A disadvantage to the green revolution is
Q45: Wolves were successfully reintroduced into Yellowstone National
Q57: There is evidence that polar bears are
Q82: Of the species now listed under the
Q86: How is an oxygen sag curve created?<br>A)
Q87: As material in the earth's mantle cools,
Q90: Compare life in the euphotic and abyssal
Q95: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8829/.jpg" alt=" Figure 15.18