Answer: Coal
Explanation: Natural gas is basically gas that comes from nature so if you use coal it creates natural smoke or gas. Also like fossil fuels create natural gas as well.
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Businessmen during the Gilded Age, in the late 19th century, supported relaxed immigration laws because they bring unskilled workers in the country. Industries in the late 19th century, employed immigrants as labors because they reduced the costs of production by paying them less money, which profited the industrialists. The supply of cheap labor was one of the reasons for the growth of industrialization in America.
Isolation and quarantine are public health practices used to protect the public by preventing exposure to people who have or may have a contagious disease.
Isolation separates sick people with a contagious disease from people who are not sick.
Quarantine separates and restricts the movement of people who were exposed to a contagious disease to see if they become sick. These people may have been exposed to a disease and do not know it, or they may have the disease but do not show symptoms.
Answer: nationalists: led by Chiang Kai-shek, supported by the US, more popular in wealthy cities
Communists: opposed Chiang Kai-shek, had the more effective army, supported by the USSR, More popular among poor farmers
Explanation: 100% on edge