The European Union has agreed to ban oil imports from Iran, pending a final decision to be made at the end of the month.
Despite Iran's rejection of accusations by Western nations that its nuclear programme is in fact a weapons programme, the EU aims to cut off funding to it.
Oil prices have risen on news of the possible EU embargo. But as Libyan oil is starting to flow again it could offset any shortages.
Al Jazeera's Caroline Malone reports.