According
to the book "Our Ecological Footprint,"
about a quarter of the ecological cost of our food
is made up of energy consumption and packaging.
Energy
use adds to your ecological footprint.
How much it adds depends on where the energy
comes from. Fossil fuels add quite a lot, because
they produce carbon dioxide, and thus require
forest land to sequester (absorb) the CO2.
How
can you reduce the amount that food
adds to your ecological footprint?