Conventional meat production is one of the biggest contributors to climate change, producing approximately 15% of our greenhouse gasses. There are ways to raise livestock that is less carbon intensive, in fact, those methods may even sequester some carbon, but they take much more space than conventional meat production does. We can’t even produce enough meat for everyone on the planet to eat as much as Americans do using our current methods, we certainly are not going to be able to produce enough meat for everyone using the carbon sequestering methods. If we want to fight climate change, a reduction in the amount of meat Americans typically eat is probably going to be necessary.