Summary
Energy conservation
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Extract
Fiddling with the dimmer switch.
Days were brighter when you were a kid. You haven't seen the difference, but you might have felt it. In recent years, data analysis by scientists in Israel, Australia, and the United States has shown that sunlight intensity, averaged across hundreds of locations on all continents, decreased by 1.3 to 3% per decade from the 1950s to 1990s. When reported a few years ago [1], these findings were controversial, but subsequent research has helped confirm the occurrence if not the precise magnitude of so-called "global dimming."
The reduction in sunlight can be traced largely to the burning of fuels, which releases "aerosols"--black carbon, ...See the full content of this document
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