From Paul Broady, Christchurch, New Zealand
Are we really going to store thousands of gigatonnes of carbon dioxide in geological formations? There are real doubts about whether the required technology will become sufficiently developed and whether the energy needed for it would be available. At present, only a few million tonnes per year are being pumped underground and much of this is used to push out more oil. We can’t wait for a scale-up that might not arrive. Deep cuts in emissions should be the urgent priority(13 September, p 10).
