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Better to drive than to walk

If it's only greenhouse gas emissions you are worried about, then it may be better to drive than to walk. 

Modern farming uses huge amounts of energy to grow, process and transport our foods. Livestock farming, particularly of cattle, is responsible for a significant fraction of all greenhouse gases. New research suggests that one kilogramme of beef adds 36 kilogrammes of CO2 and other climate changing pollutants to the atmosphere.

One implication of this finding needs to be highlighted: it makes more sense to drive than walk, if walking means you need to eat more to replace the energy lost.

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