The "artificial" ripening with Ethylene isn't really as evil as it sounds, fruit emits it anyway as it becomes ripe. If you have for example some avocados that

The "artificial" ripening with Ethylene isn't really as evil as it sounds, fruit emits it anyway as it becomes ripe. If you have for example some avocados that you want to ripen more quickly, putting them in a paper bag with ripe bananas or lemons will hasten the process significantly. Fruit on its own like bananas will ripen much more slowly than if they are surrounded by a bunch of peers.