A cap on greenhouse gas emissions makes total emissions a fixed common-property resource. Population increases under a cap are therefore self-limiting: a population increase raises labor and reduces emissions per unit of labor, which lowers incomes and fertility. Because a marginal birth under a...

The Food and Agriculture Organization of the United Nations (FAO) has estimated that in 2010-2012, 868 million people were undernourished world-wide. At the sam time, FAO reported that approximately 1.3 billion tons of food were lost or wasted globally in 2007, which was equivalent to...