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These are the best — and worst — lightbulbs for the planet
Yahoo Life· 2 years ago“Going from an incandescent to an LED is like replacing a car that gets 25 miles per gallon with...
11 Inventions That Changed the World as We Know It
HowStuffWorks via Yahoo News UK· 8 months agoInventing a useful product or process is serious business — turn a great idea into a marketable widget, and you could earn millions of dollars. But that...