Letter: Green fuel

Sir: Your report on green motor fuels (13 November) needs correcting in relation to the benefits of using propane (LPG). I confess I am surprised that Friends of the Earth should damn LPG with faint praise.

Propane is a constituent of crude oil, and I understand that North Sea oil is particularly rich in the "higher" hydrocarbons. However, as they are difficult to store, a proportion of these volatile gases is simply flared off at the refinery - so we get the nitrogen dioxide and the carbon dioxide and hydrocarbons anyway. At least if they go through vehicles first, it is instead of rather than in addition to other pollution.

CLIVE LORD

Batley & Spen Green Party

Batley, West Yorkshire