Understanding The Impact of Rising Temperatures On Human Survival The question of whether Earth is becoming too hot for human survival is gaining urgency as extreme heat waves become more common. Scientists assess this risk using the "wet bulb temperature," a measure that combines heat and humidity to determine how effectively the human body can cool itself through sweating. The Mechanics of Heat and Humidity In most of the inhabited world, it's unlikely to become "too hot for people to live," especially in dry climates. Our bodies cool off by evaporating sweat, which works efficiently in dry conditions. However, in hot, humid environments, sweat evaporates more slowly, reducing its cooling effect. This combination can be dangerous, particularly in regions where hot deserts meet warm oceans, like parts of the Middle East, Pakistan, and India. Here, summer heat waves coupled with humid air can be deadly, especially for those without access to air conditioning. We...
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