Why doesn't Lake Erie just cave in? What's holding it up? Does anyone know how much salt has been mined from beneath the lake? And now someone is taking the natural gas from beneath the ground. With what are those spaces filling up? Are we going to have one big sinkhole someday? Or maybe a lot of smaller ones? It's not just here, either, it's all over the world. Pretty soon we may be walking around on a thin crust, hoping things won't cave in.
These are a few of the questions that show up in my head on nights when I can't sleep. People who know these things just laugh and tell me not to worry; nothing bad is going to happen. How do they know?
All this worrying is giving me a headache; I need to take a nap.
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