[thirdsun]

It seems Nicaragua rejected the Paris agreement as it didn't go far enough [1]:

> As world leaders gathered in the French capital in November 2015 to reach an agreement on fighting climate change, Nicaragua's lead envoy explained to reporters that the country would not support the agreed-upon plan as it hinged on voluntary pledges and would not punish those who failed to meet them. That was simply not enough, Paul Oquist argued.

That leaves Syria, which may actually have other problems these days. The US seems to be pretty much alone in this.

[1] https://www.washingtonpost.com/news/worldviews/wp/2017/05/31...