In the year 2000, some crowded cities had over 10 million inhabitants and our planet had approximately 6 billion people living on it. Many people predict that by the year 2050, the world population will reach 9 billion. Human population growth is the number one threat to the world's environment. The cities grow larger and larger as the population is increasing rapidly, the natural land around them is being turned into homes and office buildings. Each person requires energy, space and water to survive, which results in environmental losses. The affluence would results in a larger amount of resources consumptions. As this happens, we need to take great caution in making sure we don’t harm the environment. If we don’t be careful then it could lead to disastrous effects for us and nature
With a constantly increasing population, the first and most significant crisis that the world will face is a shortage of spaces-houses. Cities are expending large and large to fit people’s requirements, trees are cut down, bush lands and wetlands are replaced by concretes and asphalt, the decline on vegetarian and tree covers would change the present climate worse. Flood, storm, hurricane and acid rain must have very bad effect on local and regional environment. Population growth causes more consumption and exploitation of energy, chemicals, and nonrenewable resources such as coal, petroleum, and natural gas. According to the data provide by Chris Walsh in Lecture 8, by increasing population 32% from 1970 to 1990, the usage of energy which is resource inputs is increasing by 28% and the solid waste and carbon dioxide released which are waste outputs are increased by 31% and 28%. These large amounts of energy consumption and wastes released are reasoned by the using of automobiles and auto machines. It is difficult to imagine life without cars and machinery. Unfortunately, these, along with factories, need energy and are the greatest polluters of our environment. As the...
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