Intuitively, it feels like hand washing is more eco-friendly than using a dishwasher. And while I’ve often received advice to skip the dishwasher as a way to lighten my burden on the planet, there are also numerous claims touting the opposite conclusion. Convictions run high on both sides of this argument, but scientific evidence backing up either viewpoint is elusive. Is it possible to use less hot water when hand washing dishes than an efficient dishwasher uses? Which methods of hand dishwashing are most efficient? And which methods of hand dishwashing are most wasteful? I headed into my own kitchen to find out.