This is what I found on FASTCOMPANY.COM:
As incomes rise in cities in India, China, and other quickly growing economies, people tend to make three major purchases first: a TV, a refrigerator, and an air conditioner. The number of AC units may swell from 1.2 billion worldwide today to 4.5 billion by 2050–and household air conditioning, alone, could push global warming up half a degree by the end of the century, according to a new report.
Information provided by FASTCOMPANY.COM.
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