From a steam railway tours brochure :- "...All our trips are carbon neutral...". And a small %age is added to the price of the tickets. I assume that this additional charge covers the planting of sufficient trees to soak up the carbon dioxide emitted by the steam loco when burning several tons of its prime fossil fuel, coal. Somehow I simply don't trust the calculations, and it wouldn't surprise me if the charge gets syphoned off en-route to the nursery forest. Am I being too sceptical? Or are these schemes open to truly independent assessment? Anyone else given it a thought?