European powers have urged the United States not to abandon the 2015 agreement with Iran that limits its nuclear programme, saying it is making the world safer.
After meeting his Iranian, French, German and European Union counterparts in Brussels, United Kingdom Foreign Secretary, Boris Johnson, insisted the deal was preventing Iran from acquiring nuclear weapons.
He also challenged Washington to come up with a better alternative.
U.S President, Donald Trump, wants to amend the deal or withdraw from it, the BBC reports.
In October, he refused to recertify for Congress that Iran was complying, accusing it of “not living up to the spirit” of the agreement.
Mr Johnson described the deal, which is known formally as the Joint Comprehensive Plan of Action (JCPOA), as a “considerable diplomatic accomplishment.”
“I don’t think that anybody has produced a better alternative to the JCPOA as a way of preventing the Iranians from going ahead with the acquisition of a military nuclear capability,” he said.
“It is incumbent on those who oppose the JCPOA to come up with that better solution, because we have not seen it so far.”