When fruit begins to spoil it releases a natural gas, this gas also causes other fruit to ripen at a faster rate. This can be useful when trying to ripen fruit quickly. Simply place bananas, apples or other already ripe fruit in an enclosed space like a cupboard or draw with fruit that is beginning to ripen. This will cause fruit to ripen much faster than usual. If you’d like to keep fruit for longer just keep it separate from fruit that has begun to ripen.