This story was originally published by the Guardian and is reproduced here as part of the Climate Desk collaboration.

President Barack Obama declared on Tuesday that some components to a global climate change agreement must carry legal force, easing one obstacle to a successful outcome at negotiations in Paris.

In an apparent compromise, Obama said the United States would push for certain aspects of a climate change agreement to be legally binding — going some distance to meeting a key demand of the European Union and some developing countries.