Open Access

Juliette N. Rooney-VargaORCiD, Rachel L. Coleman, Andrew P. Jones, Florian KapmeierORCiD, Peyton Newsome, Krystal Noiseux, Bethany Patten, Kenneth Rath, John D. StermanORCiD

• The gap between climate pledges and action remains wide, including in the United States, where politicization and misconceptions hinder action. Interactive simulations could help overcome this gap by enhancing knowledge about climate change and motivating action. But little is known about whether this approach increases knowledge about climate solutions or whether such gains persist over time and foster real-world action. Here we analyze the impact of the En-ROADS Climate Action Simulation on participants’ understanding of high-leverage climate solutions, affective engagement, intent to act, and real-world action. Data from 1246 participants show gains in climate knowledge and engagement, sustained over 6 months, and fostering real-world actions. These gains are not influenced by participants’ sociodemographic traits or sociopolitical values. These results, together with the simulation’s accessibility and adaptability to diverse settings, highlight its potential to foster informed climate action.