Daytime temps. in some of the desert areas of the planet are starting to reach levels where on some days mammals can't live very long outside. In other words, these areas are now rapidly becoming uninhabitable. That's the trend as things warm planet wise. The migrations he's discussing are already underway and that's why the talk of walls and borders is becoming more and more an issue. The right wants to frame it as a religious war , but in reality, what's really driving it is economic needs and under that is environmental degradation partially due to the warming.
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Daytime temps. in some of the desert areas of the planet are starting to reach levels where on some days mammals can't live very long outside. In other words, these areas are now rapidly becoming uninhabitable. That's the trend as things warm planet wise. The migrations he's discussing are already underway and that's why the talk of walls and borders is becoming more and more an issue. The right wants to frame it as a religious war , but in reality, what's really driving it is economic needs and under that is environmental degradation partially due to the warming.
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