We are advised not to refrigerate some food items for evidence-based reasons.
Onions should not be stored in refrigerator as they tend to spoil faster due to lack of air circulation. They should be kept in dry, clean and airy place.
Tomatoes lose the flavor if stored in a refrigerator
Apple should not be stored in refrigerator as they tend to lose their texture and flavor.
In the case of avocado, refrigeration disrupts ripening process; should be kept in a clean airy environment.
Bananas just like avocado should not be refrigerated as it disrupts ripening.