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Human bodies can adapt to cold or hot climates. They become acclimatized, or used to the climate they live in.
If you visit a place that’s hotter or more humid than home, you’ll feel uncomfortable at first. But soon your body will get used to it. You’ll start sweating more. Your temperature won’t go up as much when you exercise. Human bodies are good at adapting. That’s one big reason we can live in so many different climates.