In recent years, tofu and other plant-based nutrients have been on an upswing. More people are seeking meat alternatives that still pack the protein. By 2021, the global tofu market is expected to be worth $874 million, according to a report by Technavio. But, as Atlas Obscura points out, more meals involving tofu means more waste of tofu byproducts. The solid dregs, known as "okara," contain heaping amounts of protein and sugar, and when they're discarded, they can produce algae that obstructs waterways, resulting in diminishing oxygen levels and dead zones.