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Category: Economy

World of Slums

Just a decade ago, humanity first crossed the historic line whereby half of population resided in urban surroundings. Many see this unprecedented global urbanization trend

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Trees, Trees, Trees

Plants began to appear on Earth nearly six Billion years ago. As part of the photosynthesis process, plants produce energy and organic compounds whereby by

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Graywater

Waste water produced in residences can be divided into two types. Black water, which has fecal secretions from toilets or nutrients from the kitchen, and

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