Wall Street Journal: Over the next few decades, food security will become an increasingly urgent problem. At the same time, people will demand action on climate change. But how can we feed humanity while still responding to the imperatives of climate change? Each year, agriculture contributes about 14% of all human-induced greenhouse gases–about as much as running every car, boat and plane on the planet. Yet agriculture’s role in mitigating climate change has received little attention and very little …