Nuclear waste "is a serious health hazard, and America has a lot of it," John Oliver said on Sunday's Last Week Tonight. "And you may live closer to nuclear waste than you think." For decades, America has known it needs a safe place to store this nuclear waste — one expert in 1990 compared America's nuclear situation to a house built without a toilet — and that was Oliver's focus on Sunday: "Why do we not have a nuclear toilet?" On one level, this is easy to understand, he said, because in World War II the U.S.