Once a fringe movement, green parties are increasingly shaping the debate in countries around the world. How influential are they, and what comes next?

The European Union has navigated a thicket of external and internal crises in recent years, including mass migration and Brexit. What are the union’s core institutions, and what roles do they play?

Responsible for powering the country and its economy, the U.S. energy grid has come under increasing strain due to climate change, and the threat of cyberattacks looms.