By Stacey Leasca for GOOD

On Wednesday, 31 countries, including Argentina, Singapore, Thailand, the United Arab Emirates, and Mexico officially joined the Paris Agreement, an accord committing nations to staving off global warming at no more than 3.6 degrees Fahrenheit above pre-industrial levels. These nations now join the 30 others in representing nearly 48 percent of global emissions. But they aren’t done yet.

The agreement has closed its threshold of 55 countries, however, it still needs to hit one more important number: 55 percent.

Image: U.S. Secretary of State John Kerry addresses leaders in General Assembly Hall during a special ceremony to speed entry into force of the Paris Agreement | Image Credit: Stuart Ramson/UN Foundation