Tariff
In contrast, in economic theory tariffs are viewed as a primary element in international trade with the function of the tariff being to influence the flow of trade by lowering or raising the price of targeted goods to create what amounts to an artificial competitive advantage. When tariffs are viewed and used in this fashion, they are addressing the country's and the competitors' respective economic healths in terms of maximizing or minimizing revenue flow rather than in terms of the ability to generate and maintain a competitive advantage which is the source of the revenue. As a result, the impact of the tariffs on the economic health of the country are at best minimal but often are counter-productive.
Eco-Tariffs
One of the major issues that are raised when discussing environmental tariffs, is the issue of a reduction in trade. The argument raised is that tariffs reduce trade and may not actually be targeting the actual source of the pollution. They argue that pollution is not just as a result of imported goods but a large part of pollution suffered occurs within the borders of a country, therefore trade would merely harming trade without actually addressing the root cause effectively.