What is the concept of the externality? Give a personal example of either positive or negative externality. This example can not include, vaccinations, noise, smoking, bees,education or pollution(these are all basic google answers). Question 15 (5 points) ) Listen Describe the concept of common property and give a specific example(not general such as air, forest or water). My example would be the Delaware Bay, not easy to gain access for boating but once out there it is free for anyone to use