In order to curb CO2 emissions, the government creates a cap-and-trade system for freight companies that use semi-trailer trucks to move freight. Some freight companies have already spent lots of money investing in low-emission trucks or even developing battery technologies to decrease emissions. Other companies have invested nothing to decrease their emissions. Answer the following questions to explain how the cap-and-trade program, if implemented successfully, will decrease emissions. a. Using cap-and-trade, the government could restrict pollution by placing a on the amount of emissions each company may emit through the issue of permits.
b. One feature of the cap-and-trade policy is that permits can be traded between the "greener" companies that have already invested in emission lowering technologies and those that have not.