Which of the following is the best example of a way human lifestyles affect environmental systems?

burning fossil fuels increases the amount of greenhouse gases in the atmosphere.
using radioactive materials causes ground pollution when chlorofluorocarbons (cfcs) seep into the ground.
deforestation causes water pollution by decreasing water vapor in nearby lakes and rivers.
using aerosol sprays increases the amount of ozone (o3) in the atmosphere.