Earth homes are the oldest type of house in the world , dating back to at least 15,000 BCE , and still house upwards of 700 million people around the world.They're also remarkably efficient, affordable, and environmentally friendly.While they were once considered a niche home style, they have become increasingly popular, primarily starting in the 1970s during the environmental movement.
#people #back #years #environment #significantly #million-people #construction #regulations #electricity #sustainability
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