1. Which of the following would be most likely to cause an inward shift of the demand curve for electricity?
A. a decrease in the price of electricity
B. an increase in the price of air conditioners
C. an increase in the price of heating oil
D.a decrease in the price of natural gas
2. Which of the following is an example of a positive externality?
A. noise created by commercial aircraft
B. clearnup costs for an oil spill
C. a computer company's costs of raw materials
D.an increase in worker's productivity, caused by public education