Examlex
What is the effect of increased levels of parathyroid hormone?
Tradable Permits
A system where rights to emit pollution or other substances are given a market value and can be bought and sold.
Environmental Protection Agency
A U.S. federal agency responsible for creating and enforcing regulations to protect the environment and public health from pollution and hazardous substances.
Clean Air
The condition of the atmosphere when it is free from pollutants, contaminants, and other harmful substances.
Network Externality
The effect that an additional user of a good or service has on the value of that product to others, often increasing the utility as more people use it.
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