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List three important sources of pollutants in the United States.
Monopolistic Competition
A market structure characterized by many firms selling products that are similar but not identical, allowing for some degree of market power and differentiated competition.
Pure Monopoly
A market structure where a single company or entity exclusively controls the entire supply of a particular product or service, facing no competition.
Consumer Tastes
Preferences or inclinations of consumers that influence their buying behavior and decisions.
Legislative Changes
Amendments or introductions of new laws and regulations by a governing body.
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