Examlex
In the late twentieth and early twenty-first century,American fiction reflected
Net Energy Ratio
A measure comparing the amount of energy available from a resource to the amount of energy used to obtain that resource.
United States
A country in North America consisting of 50 states and a federal district, known for its significant influence on world economics, politics, and culture.
Oil
A viscous liquid derived from petroleum, crude oil, or plants, used as fuel, in manufacturing, and as a base for many chemicals.
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