You may have noticed that humans tend to alter their surroundings to make themselves comfortable. We have been doing it since the dawn of agriculture. While most places remain livable, some have been so badly damaged that they are no longer safe for people to live in.
Whether this was due to neglect, weapons testing, or climate change, people have been ruining the Earth for millennia. In the past century, we ramped up our efforts and caused so much damage to the planet that just staying overnight in some of these places could be a death sentence.
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