Complex sentence: When one country starts to encourage their citizens to buy domestic goods, there are usually resistances from other countries, as a result of that, poorer countries with significant disadvantage, maybe forced to add levy against a certain country.
Split into simpler sentences: When one country starts to encourage their citizens to buy domestic goods, there are usually resistances from other countries. As result of that, poorer countries with significant disadvantage may be forced to add levy against a certain country.