Quoted from Daily Grist: Top Environmental News From Around the Globe.

The next time you chomp a hamburger, think of this: the process of
getting that beef to your bun may have spewed more greenhouse-gas
emissions than leaving all your house lights blazing while taking a
three-hour joyride in your car. Researchers looked at beef production in
Japan and its impact on climate, water, and energy, and came up with
sobering statistics. Wanna hear more? Not including transportation of
meat from farm to store, production of 2.2 pounds of beef (OK, yes,
that's a big burger) also spews the same amount of CO2 as an average
European car driven 155 miles, and uses enough energy to keep a 100-watt
light bulb bright for nearly 20 days. Methane-heavy cow burps and farts
comprise most of the greenhouse-gas emissions; two-thirds of the energy
used by the industry goes to producing and transporting feed. What could
be done? Improve waste management, the study authors say, or shorten the
interval between calving. Or, if we may suggest something totally crazy:
Stop eating so much meat.