Heating your home for free, via the Sun
SOURCE: DIGG • 2010-01-21
TOPICS:
Arab • Arab People • Middle Ages • Ancient History • Middle East • Asia • Environment
[181 diggs @ Environment] The pre-Columbian ancestors of today's Indians used it. So did the ancient Romans, the medieval Arabs and many other preindustrial peoples around the world. It's still widely used in less-developed countries, and it is increasingly popular in well... read more »