Syria has become a signatory of the Paris climate agreement, leaving the United States as the only country in the world not to support the international framework to combat greenhouse gas emissions.

When US President Donald Trump announced that he intended to pull out of the agreement, at the time it meant that only the US, Nicaragua and Syria were the countries on Earth not to be part of the deal.

Until recently Nicaragua remained a holdout nation, but only because they believed the agreement didn’t go far enough to putting limits on emissions and helping poorer countries adapt to the agreement with solid financial commitments from wealthier nations. Nicaragua is now a haven for renewable energy, with more than half of their energy coming from geothermic, wind, solar and wave energy.

Now that Syria has signed the deal, the United States is the only country not to sign it.

“As if it wasn’t already crystal clear, every single other country in the world is moving forward together to tackle the climate crisis, while Donald Trump has isolated the United States on the world stage in an embarrassing and dangerous position,” Sierra Club Executive Director Michael Brune told reporters.

“With Syria on board, now the entire world is resolutely committed to advancing climate action – all save one country,” a statement from the World Resources Institute noted.

“This should make the Trump administration pause and reflect on their ill-advised announcement about withdrawing from the Paris Agreement.”

Under President Barack Obama, the US was one of the earliest countries to sign the deal and put it into action. But Obama signed the deal with an executive order to bypass Congress, resulting in the agreement not being a legally binding treaty. This paved the way for Trump to withdraw from the agreement.