The plastic waste problem has grown into a crisis over the past year as more people have become aware of ocean plastic litter and China shut its doors to waste plastics imports from the rest of the world. In the U.S., little plastic is being recycled, and the prospects for boosting recycling significantly and in short order are slim. Some observers are arguing for burning plastic that can’t be recycled to extract its energy value. But that might be easier said than done. Burning more plastics in waste-to-energy facilities poses economic and societal challenges.