Answer: "conjecture" .
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Its cheaper, better for environment,
I believe that would be subsidence
The answer is the first one. According to statistics, immigrants are responsible or 25% of new businesses and job growth.
The Earth has a crust, mantle, outer core and the inner core with each one getting hotter than the next. How come, over millions and millions of years, the heat that is at the center of the Earth hasn't conducted throughout the planet's material so that the entire planet is one even temperature?
This always bothered me because we all learn that temperature diffuses from high areas to low areas, yet the Earth's center is super hot while if you dig a one foot hole, the ground feels quite cold.
