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Thank you, Keith - I'm glad somebody made this point. Those of us who don't have children (in my case, voluntarily) are perfectly capable of caring strongly about the future of the planet. Sally Heslop ------------------------------------------------------- Dr Sally E Heslop Tel +44 117 928 8840 Univ. of Bristol Fax +44 117 928 7783 Civil Engineering, e-mail [log in to unmask] Queen's Building, University Walk, Bristol BS8 1TR.