Bananas are a popular snack for Ultimate players, except when they are inedibly green.
green banana next to a ripe apple gives the banana exposure to a source of ethylene gas to quicken the ripening process.
Step 1: Put the banana in the bottom of a brown paper bag.
Step 2: Put two ripe apples beside the banana in the bag.
Step 3: Fold over the top of the bag, closing it loosely to allow air to penetrate the bag while still trapping the ethylene gas.
Step 4: Place the bag in an area that maintains room temperature out of direct sunlight.