How much of a carbon footprint does cycling create?
.This very informative piece is from The European Cyclists Federation website, courtesy of a correspondent:
how much CO2 does cycling really save?
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In other words, for the Sidmouth to Sidbury route, return 11km, the carbon footprint is one twentieth less if you ride your bike:
Bike Carbon footprint (depending on breakfast) 32g x 11km = 350g (ie 350ppm)
Car Carbon footprint, or total CO2 emissions, 584g x 11km = 6,424g (ie 6.4KG+pollution)
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With more info here:
Does bike commuting impact your carbon footprint? And how much?