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Scientists from an international group (several countries) conducted large-scale study of megacities for their spending various resources: electricity, heat, water, and also on the subject “production” of waste.
It turned out that precisely megacities are the most “gluttonous” monsters, in addition, and the most “waste” settlements. Today, cities with a population of more than ten million people there are twenty seven in the world. For example, in 1970 their there were only eight, and by 2020 it is expected to be already thirty seven. Currently lives in megacities around six to seven percent of the world’s population, despite this, such huge cities consume more than nine percent of the entire electricity generated on Earth and produce almost thirteen percent of the waste that to some extent becomes the reason that megacities become breeding grounds for rats, and how the consequence of this is also all kinds of epidemics.
True, such indicators in different cities are not the same. TO For example, in Tokyo, energy consumption is an order of magnitude lower than in New York, although the population is twelve million more. By the way the capital of Japan shows excellent results in many other ways parameters, for example, water leakage in the city’s water supply system make up only three percent. For comparison, in Sao Paulo either Rio de Janeiro, this figure reaches fifty percent, and indeed in other megacities it is not much smaller. So in consumption water in big cities was and remains a major problem her loss.
Scientists have identified three more megacities of the world in which they successfully Resolve resource issues. This is London, which systematically reduces energy consumption, despite the increase GDP. A unique system has been created in Seoul purification and recycling of water. Moscow was distinguished by the fact that effectively uses CHP on the principle of cogeneration – joint heat and electricity generation.
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Water
