Free trade means that goods can be bought and sold without restrictions between different countries. The WTO (World Trade Organization) was set up to deal with the global rules of trade between nations.
Multinational companies operate in more than one country. Because of their size (= « la taille »), they are very powerful and sometimes the countries in which they operate find it hard to make them comply with (« respecter ») national laws. Some of them have been accused of tax avoidance (« évasion fiscale ») by the European Union.
Globalization means that companies and businesses operate all over the world thanks to the internationalization of markets. It encourages the circulation of goods, services and capital. Globalization has an impact on economic development but also on culture, the environment and prosperity. Supporters of globalization claim ("affirment") that it will lift people in developing countries out of poverty while its critics say that, on the contrary, it has increased inequalities worldwide.