Examlex
When natural waters are overloaded with plant nutrients such as nitrate and phosphate ions, they become
Miles
A unit of distance measurement equal to 5,280 feet or approximately 1.609 kilometers, used primarily in the United States and the United Kingdom.
Perfect Substitutes
Goods or services that can be used in exactly the same way and are interchangeable in consumption or use.
Income Effect
The variation in a person's or an economy's earnings and its effect on the amount of a product or service that is requested.
Substitution Effect
The change in consumption patterns due to a change in the relative prices of goods.
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