The rules for this are set by nature, not by man. We must therefore look at each human activity and try to change it or create alternatives if it is not sustainable. In other words, they think that in a world of fixed and limited resources, what is used today will not be there for our children. An increasing number of people believe that we should live within the rules set by nature. In the past, they didn’t have to think too much about the impact that their decisions had on the natural world. They do so because they invent things and make decisions that shape the future of the world that we live in. But this is something that scientists and politicians often do. Predictions can, of course, be wrong, and it is very difficult to predict what the world will be like in 100, 50, or even 20 years from now. Thomas Watson, the chairman of IBM in 1943, was wrong too when he said that he thought there would be a world market for only five or so computers. "Heavier than air flying machines are impossible," said the well-known scientist Lord Kelvin in 1895. Remember, it may be helpful to refer back to the reading text while answering the questions to ensure accuracy.) (Please note: The following questions are related to a specific reading passage, which is available solely before the first question.
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