“A banana contains about 100 calories of food energy, and if you incinerate whole bananas as fuel, it would only take about 10 bunches per day to keep your house running.”
One banana’s potassium-40 produces a couple of picowatts, about what a single human cell uses. Bury New York in bananas and they rot long before the radiation matters. The banana dose was invented by nuclear engineers to calm people down. It made people scared of bananas instead.