Links considered to be of particular interest to visitors of this site:

• The STAR database of the EEA
  The STAR database is an inventory of current environmental policy targets and sustainability reference values (SRVs) which apply in the EU, in a range of countries in the European Free Trade Association (EFTA), in Central and Eastern Europe (CEE), and in the Newly Independant States (NIS).
• OECD/EEA economic instruments database
  This database concerns economic instruments and voluntary approaches used in environmental policy and natural resources management
• EEA indicators.
  A list of all published EEA environmental indicators, pointing to analyses of their development.
• EU legislation on air.
  A list of EU legislation on air, grouped under the following headings: ambient air quality; emissions from stationary sources; VOC's; National Emission Ceilings; transport and environment.
• US regulations: Electronic Code of Federal Regulations (e-CFR)
  Link to Title 40 (Protection of Environment), Chapter 1 (Environmental Protection Agency).