Measures Against Warming

To cut greenhouse gases as cheaply as possible, start with the measures on the left that pay for themselves, then take the more expensive steps on the right. McKinsey says that doing all the things below, including those unlabeled, would cut 3 billion metric tons of emissions per year in 2030 vs. what they would be at current growth rates. That would put emissions below current levels. The width of each bar is the volume of emissions reduction, and the height is the cost in today’s dollars.