Dire or emotionally charged warnings about the consequences of global warming can backfire if presented too negatively, making people less amenable to reducing their carbon footprint, according to new research from the University of California, Berkeley. “Our study indicates that the potentially devastating consequences of global warming threaten people’s fundamental tendency to see the world as safe, stable and fair. As a result, people may respond by discounting evidence for global warming,” said Robb Willer, UC Berkeley social psychologist and study coauthor.