The document discusses three main types of economic trade barriers: tariffs, quotas, and embargoes. Tariffs are taxes on imported goods that raise their prices. Quotas place limits on the quantities of goods that can be imported, creating shortages and higher prices. Embargoes completely ban trade with another country. The EU uses all three barriers: tariffs on non-EU goods, quotas on steel imports from some countries, and recent embargoes on weapons sales to Iran.