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McKibben was good, but too focused on carbon as the problem. There are many greenhouse gases (GHG) of concern, such as methane that are signficant contributors. In turn, livestock, especially cattle, are big sources of this GHG.

The UN Report, Livestock's Long Shadow, stated that production/transportation of livestock contributes as much to climate change as the transportation sector. A good primer on livestock and climate change is the video "Meat the Truth," which you can view at

To McKibben's credit, he did mention that red meat consumption is a problem. But it would be good to give cutting back or eliminating beef from one's diet as one of the easiest ways for an individual to combat climate change.