The personal views of Sir David concerning the release of GM material into our fragile environment continue to be out of step with most scientists, as well as the wishes of 95% of the UK population.

The risk of GM contamination is high - especially in view of the problems that we already have containing conventional pathogenic material in laboratories. And rising energy costs will compound any mitigation measures that we might have had in place for dealing with problems caused by unforeseen GM 'accidents'.

We have been abusing our planet for over 200 years. It's now time to take stock and restore sustainability -- before unleashing yet another assault on the natural world.

Steve Rawlings, Chepstow, Wales

Sir, is a disappointment to see GB with all these opportunity’s, regarding renewable energy sources, waiting to be exploited such as wind, solar and why not tidal sources being abounded and have your PM choosing as a source the Atomic Power which is also a possible an atomic bomb hit in the possibility of a war or terrorist attack, shall we expect more Big Brother activities as the risks increase? GB do not forget smaller countries waiting for your example to follow as they look up on you.., As about the GM crops, do not mean to be too conservative but were the human DNA is going too, do not you think that people should be careful for our children’s future?

Angelos Kontos, Corfu, Greece

Thank goodness for some common sense at last.
If only he had tried harder, sooner.
We are now faced with pulling this issue back from the brink of 'green' madness.

Terry Joslin, Didcot, UK

A double pronged attempt to destroy the human race. People would be horrified if they knew how little our scientists understand about genetics, we are roughly at the stage of stone-age children playing with fire. As for nuclear power, we need to develop forms that do not threaten life when they make the inevitable bid for freedom. We already have suffered too many radioactive releases and the more we adopt nuclear power the more frequent, and worse, such releases are going to be.

Mike Poulsen, Reading, Berkshire