> but the "climate" would be correlation, instead of causation. Two I've heard in the modern era are asthma and allergies. I'm not sure if it helps with asthma

> but the "climate" would be correlation, instead of causation. Two I've heard in the modern era are asthma and allergies. I'm not sure if it helps with asthma but different climates definitely affect allergies, particular the prevalence of more evergreen trees in warmer climates means there's a reduced/missing allergy season.