From Tony Marmont
Olive Hefferman indicates that plant growth is “increased with extra CO2 and temperature” and this is of course true (7 May, p 20).
More than 20 years ago, the Royal Agricultural Society ran tests in geodesic domes at Kenilworth with different temperatures and carbon dioxide levels. As expected, plant growth was enormous in the highest temperatures and CO2 concentrations. But the yield of seeds dropped to low levels or nil. That is not something we could live with.
Loughborough, Leicestershire, UK
