An economy produces computer chips and fish. In 2014, one pound of fish costs $10, a computer chip costs $10, and the economy produces 10 pounds of fish and 10 computer chips. In 2015, when the economy produces 5 pounds of fish and 20 computer chips, one pound of fish costs $20 and a computer chip costs $5. Real GDP in 2015 (at 2014 prices) was dollars.

Juanita and sam attend a beach party and notice that the local beach appears to have a great deal more trash washed up on shore than it did when they were young. the water doesn't appear nearly as clear, and there seems to be less evidence of small water creatures living in the shallows. an afternoon at the local library convinces them that one major cause is the new factory nearby. after some discussion, they decide their next step should be identifying the cause of the changes identifying the problem picketing the guilty factory lobbying their elected representatives to complain about the problem talking to a local environmental group about solutions