[lebed2045]

+1 to this. I only recently learned that concrete/cement production is major factor of co2 emission that significantly bigger than a meat production for example. Sounds like modifying this production method is more effective way to fight global warming than me start to be vegetarian.

[PeterisP]

The impact of meat on global warming is mostly through methane, not CO2. So comparing its CO2 emissions to concrete industry CO2 emissions is not an appropriate comparison, you should compare "CO2-equivalent of all meat-related greenhouse gases" to the CO2 emitted by concrete industry CO2.