Open Access

Juliette Rooney-Varga, Eduardo Fracassi, Travis Franck, Florian KapmeierORCiD, Carolyn McCarthy, Karen McNeal, Nicole Norfles, Kenneth Rath, John Sterman

• Many scientific reports have warned about the catastrophic consequences of unchecked climate change, with the latest international report calling for emissions of climate pollutants to reach net zero by around 2050 (IPCC, 2018). Limiting warming to 1.5°C could save more than 100 million people from water shortages, as many as 2 billion people from dangerous heatwaves, and the majority of species from climate change extinction risks (IPCC, 2018; Warren et al., 2018). The actions taken to achieve these climate outcomes would generate benefits of more than $20 trillion while easing global economic inequality (Burke et al., 2018). Scientists make it clear that it is physically possible to meet these goals using today’s technologies (Holz et al., 2018). Yet emissions of climate pollutants continue to grow, reaching a new record high in 2018 (Jackson et al., 2018). Clearly, scientific evidence has failed to spark needed climate action. The question now is: what can?