The neighboring countries to reduce the amount of carbon dioxide from entrepreneurs in the country. (B) to substitute for that country. EPL itself cannot achieve the goal to reduce the amount of carbon dioxide in their own country.
The neighbors bought the carbon from the operators in the country to substitute for itself unattainable goal of reducing carbon dioxide in their own country.
The neighboring countries to buy reducing carbon dioxide from enterprises in country B to replace the country, it can not achieve to reduce the amount of carbon dioxide in his country by yourself.