Teenagers living in neighbourhoods with more greenery may have less aggressive behaviours suggests a new study. Researchers at the University of Southern California (USC) recently conducted the first longitudinal study to see whether greenery surrounding the home could reduce aggressive behaviors in a group of Southern California adolescents living in urban communities. The team followed 1287 adolescents age 9 to 18 years. They assessed the adolescents' aggressive behaviors every two to three years asking parents if their child physically attacked or threatened others destroyed things or exhibited other similar behaviors. The researchers then linked the adolescents' residential locations to satellite