Sources Experts & Spokespersons
International Dark-Sky Association
Concerned with stopping the adverse environmental impact of light pollution and space debris.
IDA works to protect the night skies for present and future generations.
* Advocate for the protection...
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For 90 years, lightbulbs were designed to burn out. Now that's coming to LED bulbs
In 1924, representatives of the world's leading lightbulb manufacturers formed Phoebus, a cartel that fixed the average life of an incandescent bulb at 1,000 hours, ensuring that people would have to ...
The City in History
Its Origins, Its Transformations, and Its Prospects
Beginning with an interpretation of the origin and nature of the city, Mumford follows the city's development from Egypt and Mesopotamia through Greece, Rome, and the Middle Ages to the modern world.
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