NEWTON — Johnny’s Luncheonette was bustling at lunchtime on a recent Tuesday, with a steady flow of customers sliding in and out of plum-colored booths and digging into flapjacks and sandwiches.

In September 2015, the U.S. set an ambitious target of reducing its food loss and waste by 50 percent. The idea was to reduce the amount of food that ends up in landfills, where it emits greenhouse ...

File: Decomposing food scraps at Bennett Compost in Northeast Philadelphia. (Kimberly Paynter/WHYY) This story is part of the WHYY News Climate Desk, bringing you news and solutions for our changing ...