The two gasses in the troposphere that play vital role in heat absorption are the water vapor and the carbon dioxide. Both of them are gasses that trap both part of the solar heating, and part of the Earth's heating, and they play a vital role in the regulation of the temperature on the Earth with the process better known as ''Greenhouse effect''.
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The two major disadvantages of wind power include initial cost and technology immaturity.
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Hello. You did not put the answer options, but one of the biggest innovations that allowed the planting of crops in mountainous regions was a technique called terracing.
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Terracing is the technique that allows the division of sloping areas in mountainous regions. This technique, although ancient, was an innovation in the American continent, which allowed planting in the mountainous region, since it was possible to establish irrigation systems without causing soil erosion or the drainage of nutrients. In addition, the terracing increases the cultivation areas and can even retain rainwater, reducing irrigation costs.
Answer: A. The organization of territories and the admission of states.
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