The Paris agreement is complex and works in a slow bureaucratic manner. It’s a mostly voluntary climate pact originally written in ways that would both try to reduce a worsening climate change problem and withstand the changing political winds in the United States.

The world’s largest economy and second-largest emitter of greenhouse gases will withdraw from the global climate pact, disrupting efforts to tackle climate change

Trump signed an executive order that begins the process of withdrawing from the Paris Climate Agreement, which he also did during his first term.