Colin Rosenstiel wrote:
In article . com,
(John B) wrote:
Directly: the train/bus doesn't need to use energy to accelerate
80kg of you every time it speeds up, nor to raise 80kg of you up any
hills it may climb.
But, AIUI, you use less energy (food) cycling than walking.
Sounds right - but then the construction of the bike itself requires
energy (in the construction process itself, in extraction and transport
of the raw materials, and in transport of the bike to the shop). I
imagine that it's a close call which depends on the lifetime of the bike.
--
Dave Arquati
www.alwaystouchout.com - Transport projects in London