A new study has found yet another health benefit of green space, finding that adolescents who live in neighbourhoods with more greenery may have less aggressive behaviours. Previous research has already shown the important effect that our environment can have on our health, however not much is known about how our outdoor environment can influence behaviour. This new longitudinal study, by researchers from the University of Southern California (USC), looked at 1,287 adolescents age 9 to 18 years living in urban communities in Southern California to see whether greenery in their neighbourhood could reduce the teens levels of aggressive behaviour. The team assessed the levels of aggressive behaviours every two to three years by asking parents if their child physically attacked or threatened others, destroyed things, or demonstrated any similar aggressive behaviours. Satellite data was then used to measure the level of greenery in the area. Teens who live in greener areas showed significantly fewer aggressive behaviours than those living in neighbourhoods without much greenery, says study.