1. Council Directive 96/61/EC of the 24th September 1996 concerning integrated pollution prevention and control.
2. Council Regulation 85/337/EEC of the 5th July 1985 (European Communities — Environmental Impact Assessment Regulations) on the assessment of the effects of certain public and private projects on the environment.
3. Council Regulation 1836/93/EEC of June 1993 allowing voluntary (Eco-Management and Audit Scheme) participation by companies in the industrial sector in a Community eco-management and audit scheme.
4. Com(97) 500 final-97/0266(SYN) Proposal for a Council Directive relating to limit values for sulphur dioxide, oxides of nitrogen, particulate matter and lead in ambient air, OJ C9.
5. Air quality guidelines for Europe. WHO regional publications. European series: no. 23. Copenhagen: WHO Regional Office for Europe 1987 (Guidelines were revised in 1997).