I would either answer sanitation(pollution) or corruption
These are all matching questions
1. Sanction. Countries may place restrictions between each other if they can not come to an agreement that benefits both.
2. Embargo. Example- The U.S. and Cuba have had an embargo. Neither country will trade with the other.
3. Quota. This allows only a certain amount of a product to come into a place. This may be a good thing if a substance is illegal or if the substance or product could somehow be used for the wrong reasons.
4. Subsidy. Sometimes the government will help farmer's by giving them money to plant certain crops. This helps both the economy and the farmer.
5. (Protective)Tariff
6. Boycott. People could boycott a store, if they do not agree with company's beliefs. An example would be Target allowing Transgenders into women's restrooms.
