Letter: Pedalling humans vs electric vehicles

Sir: Philip Insall (letter, 1 July) is clearly correct to highlight the fact that electric vehicles transfer the location of pollutant emissions rather than eradicate them. However, is there truth in his contention that 'the emission- free vehicle is the human being'?

If the working population of London were to commute by bicycle, has anyone calculated the volume of carbon dioxide and megawatts of heat that would be dumped into the atmosphere by these pedalling humans?

Yours faithfully,

JOHN WATSON

Ewell, Surrey

1 July