These two technologies were the development of a safe elevator and the method of building using a grid of steel beams.
In 1853, an American inventor called Elisha Graves Otis developed a safety device that kept elevators from falling should a cable break. This new development had an enormous impact on public confidence. Later in the century, the change to an electric motor made the elevator a practical solution to the problem of getting up and down tall buildings.
In Chicago during the 1880s, lack of space for building became a problem due to a high rate of development, and the only alternative was to build upward. Construction techniques had to change and so a new method of building was developed that used a grid of steel beams and columns that were strong enough to support any stresses or forces a building may experience. With this new building method, the skyscraper was born.
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500 to 1,200 and licenses suspension for 30 days for 1st offence, no less than 30 days for second offence and 30 to 120 days for subsequent offenses.
Well climate change affects cold places much worse then hot places. Imagine you had ice and and dirt in your hand. From your body heat being climate change Wich would change more. The ice because it would melt in your hand changing the landscape and temperature around the area.
In what matter do you mean this ?
All I really know about Karl Marx is that he didn't like capitalism. So I would have to say the invention of capitalism.
