Carbon emissions trading systems are socially beneficial and fair. Benefits of a better environment may help certain areas start having tourism when they have not before. The efficiency and equity involved create a fair system. Also, because carbon emissions trading has been happening more frequently than ever before, it is good economically thus leading to social benefits for those who work for companies gaining from the system.
Carbon trading enables nations who have carbon emissions to spare and still fall within suitable carbon emissions range, and then this range is sold to another nation, so that it can essentially break with legislation and still be "legal". This completely negates the fact that legislation even exists. Carbon emissions trading is not fair.