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Environmental enhancement and the ‘aims of structural design’ We have received a plea from Mr R. P. Strauss of Stratford-upon-Avon to the effect that, as structural engineers, we should more specifically include ‘environmental enhancement’ as one of our declared ‘aims’: ’The IStructE document Aims of structural design proposes function, economy and safety as the desired objectives. In the first ‘cost v. maintenance-cost’ equations of economy, an additional ‘environmental enhancement factor’ should be considered. Environmental enhancement refers to the impact of the chosen structure on its users and beholders rather than, for example, the flood protection aspects of the Thames Barrier or the pollution reduction aspects of water treatment. Verulam