[Greenbuilding] Growing food by electeric light - urban sustainability?
Alan Abrams
alan at abramsdesignbuild.com
Mon Jun 11 05:36:27 CDT 2012
<Quick back-of-the-envelope calculation:
Plants convert about 2% of the energy they receive into stored energy
that we can digest. Lettuce, for example, could have 80 calories per
pound. Or 93 watt-hours. Which would require 4.65 kWh of electricity.
Trucking lettuce on the other hand, (according to Elliot Coleman) takes
about 1.18 kWh per pound from California to Maine.>
Yes, but there's more to nutrition than calories...
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