International Organization

1. A person sent to represent others, particularly at a conference.
4. A biological community of interacting organisms and their physical environment.
5. The process by which a person becomes protected against a disease through vaccination.
6. The withdrawal of the United Kingdom from the European Union.
9. The variety and variability of life on Earth, which is typically considered at three levels: genetic diversity, species diversity, and ecosystem diversity.
10. An official ban on trade or other commercial activity with a particular country.
12. Taxes imposed by a government on imported goods.
16. General agreement among a group.
17. The natural home or environment of an animal, plant, or other organism.
19. A formally concluded and ratified agreement between countries
20. Restricting the movement of people and goods to prevent the spread of disease.

2. A widespread occurrence of an infectious disease in a community at a particular time.
3. The action of clearing a wide area of trees.
7. The condition of being diseased or the incidence of illness in a population.
8. A constitutional right to reject a decision or proposal made by a law-making body.
11. A biological preparation that provides active acquired immunity to a particular disease.
13. A method of dispute resolution used by the WTO where a neutral third party provides a binding decision.
14. To give formal consent to a treaty, contract, or agreement, making it officially valid.
15. The founding document of an organization, detailing its purpose and structure
18. A firm decision to do or not to do something; in international relations, a formal expression of opinion or intention agreed upon.