This Directive lays down provisions in relation to the following:
((1))
defining and establishing objectives for ambient air quality designed to avoid, prevent or reduce harmful effects on human health and the environment;
((2))
setting common methods and criteria to assess the ambient air quality in Member States;
((3))
monitoring current ambient air quality and long-term trends as well as impacts of Union and national measures on ambient air quality;
((4))
ensuring that information on ambient air quality is comparable across the Union and made available to the public;
((5))
maintaining air quality where it is good and improving it in other cases;
((6))
promoting increased cooperation between Member States and their competent authorities and bodies in reducing air pollution.