Use the following to answer questions :
Figure: City with Two Polluters 
-Which example is a good or market activity that is associated with a positive externality?
Definitions:
Goodwill
An intangible asset that represents the value of a company's brand name, customer relationships, and other non-physical assets that contribute to earnings.
Patent
A legal right granted to an inventor or assignee to exclude others from making, using, or selling an invention for a certain number of years.
Copyright
A legal right granted to an author, composer, playwright, publisher, or distributor to exclusive publication, production, sale, or distribution of their original work.
Trademark
A recognizable symbol, design, or expression that uniquely identifies and legally protects the brand or product of a particular source from being used by others.
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