Natural, it is not man made.
If you could dig a tunnel right through the Earth you could theoretically free-fall to the centre of our planet in just eighteen minutes. You can’t, of course: such a tunnel would have to tolerate temperatures as high as the surface of the Sun and pressures three and a half million times greater than those at the Earth’s surface.
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because of their daily growing population each country you mentioned is affected by population growth
Answer:
the production of commodity crops in large-scale agribusiness organizations termed plantations which have a strict bureaucratic internal structure is called plantation agriculture