MR USHERWOOD asks if cyclists have "stealth technology?" (Letters, June 2).

My list compares the general energy efficiency of various forms of travel.

1. Cyclists, 100 per cent;

2. Walking, 40

3. Train, 28

4. Bus, 25

5. Moped, 22

6. Car, four share, 13

7. Horse rider, eight per cent;

8. Car driver, three per cent.

Cyclists take first place for not contributing to global warming.

Colin Clarke,

The Crescent, Stamford Bridge.