A Community strategy to combat acidification. Communication from the Commission to the Council and the European Parliament. Proposal for a Council Directive relating to a reduction of the sulphur content of certain liquid fuels and amending Directive 93/12/EEC. Proposal for a Council Decision on the conclusion by the European Community of the Protocol to the 1979 Convention on long-range transboundary air pollution on further reductions of sulphur emissions. COM (97) 88 final, 12 March 1997