No, we’re not talking about carbon emissions. Your nails are not suffering from global warming the way the polar bears are. It’s just that sudden changes in the weather, or extreme weather conditions, might be affecting your nails. Usually the culprit is cold, dry weather that dehydrates the nail plate, causing layers to separate and flake off. To solve it, try rubbing in a rich lotion or moisturizer every morning and evening—and wear gloves!