Two manmade pollutants known best as threats to human health have just been charged with two more offenses: shifting rainfall patterns and mucking with food production. Black carbon and tropospheric ozone, both of which derive from the incomplete burning of fossil fuels, may be working in cahoots with greenhouse gases to expand Earth’s tropical belt…

A huge amount of water goes into the food we eat — much more than most people think. Indeed, it takes a thousand times more water to feed the human population than it does to satisfy its thirst. This remarkable relationship between water and food security is exactly what the United Nations Food and Agriculture…