We use worldwide satellite data to analyse how population size and density affect urban pollution. We find that density significantly increases pollution exposure. Looking only at urban areas, we find that population size affects exposure more than density. Moreover, the effect is driven mostly...

Recent evidence suggests a positive impact of air pollution on crime in large cities. We provide first evidence on the potential effect of air pollution on criminal activity using a broader set of geographical regions with lower air pollution levels. We use a unique combination of daily crime...