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What is a population?
Air Pollution
The presence of harmful or excessive quantities of substances, including gases, particulates, and biological molecules, in the Earth's atmosphere, causing diseases, allergies, or environmental damage.
Donations
Voluntary transfers of resources, including money or goods, from one party to another without the expectation of receiving something in return.
External Benefits
The positive effects of a production or consumption activity on third parties who are not directly involved in the transaction.
Efficient Level
The optimal point of production or operation where resources are utilized in the most effective manner, without waste, to achieve a desired outcome or maximized benefit.
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