These Regulations amend the Environment (Northern Ireland) Order 2002, the Air Quality Standards Regulations (Northern Ireland) 2010 and the Environmental Protection (Disposal of Polychlorinated Biphenyls and other Dangerous Substances) Regulations (Northern Ireland) 2000. the 2010 Regulations are amended to implement those articles of the European Union Directive on Cleaner Air for Europe (2008/50/EC), which set out differing treatment and actions relating to exceedances when these are due to natural factors (see Article 20), or to winter-sanding or salting of roads. The other Regulations are amended in respect of references to EU legislation (Directive 2008/98/EC of the European Parliament and of the Council on waste and the European Union Directive on Cleaner Air for Europe (Directive 2008/50/EC)).