Fruit and vegetables should be stored separately from each other. Nielsen says that several kinds of fruit, including apples, emit a gas called ethylene that can cause certain vegetables (leafy greens, carrots, cauliflower, cucumbers, eggplant and broccoli) to ripen and spoil prematurely when kept in close quarters in the fridge. Use your refrigerator’s crisper drawer to keep these fruits away from sensitive vegetables and, in an ideal environment, with low humidity. Fruit should be kept in its original packaging, or in a loosely closed plastic bag. As a rule of thumb, delicate fruit such as berries should be eaten within a few days. Hardier fruit, such as apples or oranges, can last a couple of weeks in the fridge. For a list of fruit and vegetables that don’t need to be refrigerated, see the sidebar below.