How do national parks fit in with muir's ideas about preservation?

John Muir thought that the parks should be preserved for poor people as well as rich. Thus, Americans of all sorts shared the same need for getting back in touch with nature. Though Recreation on National Parks is commonly expressed purpose of the parks which usually means outdoors exercise in the form of hiking, camping, fishing or boating, it fits on John Muir understanding that recreation should be a re-creating of our inner selves through immersion in nature. He wrote in his book of “Our National Parks” on 1901 that the parks should offer winldness which is another word for nature and that wildness is a necessity. Moreover, he belived that a nation of tired, nerve-shaken, over-civilized people seek in the parks an escape from the vice of over-industry and the deadly apathy of luxury. 

the industrial development of cities in the ruhr area in the nineteenth century is described. the research was based on english and german language sources. several factors that shaped growth and paths of the cities were categorized and analyzed. they are locations, resources, traditions, entrepreneurs, and technological developments. locations and resources were the most important among them; other factors may be regarded as consequences from locations and resources. among the cities, bochum, essen, gelsenkirchen, and dortmund had the richest resources and most favorable locations in the transportation network and grew to be the largest cities in the ruhr area near the end of the nineteenth century. riverside location was also a favorable factor for the development, as shown in the development of duisburg on the confluence of rhine and ruhr. resource distribution can explain the rise of textile industry, metallurgical industry, and coal and iron industries, and the northward progression of the mining industry. tradition was an important factor for cities such as krefeld, barmen, elberfeld, solingen, and remscheid, which experienced development based on their traditions through the nineteenth century. various entrepreneurs exerted influences within and beyond the local level over the ruhr area. technological development stimulated the northward progression of the mining industry and the deep connection between the coal and the iron industries.