This study tests the hypotheses that overall environmental knowledge and climate-specific knowledge are inversely related to climate change anxiety, such that people who know more (less) about the environment in general, and about climate in particular, are less (more) anxious about climate change. Time lagged data were collected from N = 2,066 individuals in Germany. Results showed that, even after controlling for demographic characteristics, personality characteristics, and environmental attitudes, overall environmental knowledge and climate-specific knowledge were negatively related to climate change anxiety (both B = -.09, p < .001).
Beware of extrapolating such a conclusion from people in Germany - among the best-informed countries - to a headline implying it applies to the world.
Also, looking at that scatterplot, without the lowest knowledge chunk on the left, it seems there would be no correlation aomng the rest.