Answer:
Without deep-rooted prairie grasses to hold the soil in place, the grass began to blow away. Eroding soil led to massive dust storms and economic devastation is your correct answer.
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Answer: gold, copper, and iron ore.
The correct answer is that Russia and Britain sent troops to protect their interests there. This was aimed at ensuring that the countries had substantial influence in order to restrict foreign access. Oil was an important resource and still remains important as an energy source