Corn farmer Jerry McCulley sprays the weedkiller glyphosate across his cornfield in Auburn, Ill., in 2010. An increasing number of weeds have now evolved resistance to the chemical.
A handful of restaurants across the U.S. are experimenting with no-tipping models, opting instead to charge higher set prices for menu items and give their servers higher hourly pay.
Pine nuts aren't farmed; they're harvested from forests. The nuts are hidden inside the cones of certain species of pine, such as this pinyon in Utah's Fishlake National Forest.