COMMENT From Mr Elliott Mannis.
Sir, Are all biofuels equal? It is a question we need to consider as we respond to the growing need to diversify energy supplies and reduce emissions through adopting renewable fuels. As your recent article on the possible pitfalls of tax incentives for biofuels points out ("Elusive cornucopia: why it will be hard to reap the benefits of biofuel", June 21), converting food crops into fuel may not necessarily offer the expected energy efficiencies and emissions reductions.
