This document provides an overview of international trade barriers and the dynamic global environment. It discusses different types of trade barriers countries employ like tariffs, quotas, embargoes and standards. While trade barriers aim to protect domestic industries and jobs, they can also decrease total world output and limit variety. The document also outlines benefits of free trade like increased specialization and access to larger markets, though free trade may negatively impact some domestic producers and jobs. Overall, it presents perspectives on both free trade and barriers to international trade.