||What percentage of people live in cities that exceed the WHO limits
||92% of the global population (sourced in 2021).
||Does pollution affect our physical health?
||Air pollution has adverse impacts on individuals’ physical health and was listed as one of the ten leading risk factors for the global burden of disease in 2010. 
||Does pollution affect our mental health?
||Research has found a correlation between negative mood and increased air pollution.
||Does pollution affect pro-environmental behaviour?
||Research suggests a link between low mood and increased air pollution. This low mood is suggested to have a negative effect on an individual's pro-environmental behaviour. More research is needed to identify a cause-effect relationship. 
||What pro-environmental behaviours are impacted by air pollution?
||Research has found a correlation between air pollution exposure and less pro-environmental behaviour including, engaging in recycling, participating in sustainable travel, donating to environmental organisations and purchasing pro-environmental products. More research is needed to identify a cause-effect relationship.