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21st Century Tech Blog
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Urban Management In The 21st Century Requires “Smart City” Solutions
lenrosen4
-
April 9, 2025
Cities
Smart Lighting For Sustainable 21st Century Cities
lenrosen4
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March 30, 2025
Cities
Why Petrochemical Dependency Is Making Our Houses Burn Down
lenrosen4
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February 5, 2025
Cities
LA Burning Is Hard To Ignore If You Cover Climate Change
lenrosen4
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January 14, 2025
Cities
The Present And Future Internet of Things For Sustainable Construction
lenrosen4
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September 5, 2024
Agriculture
Headlines at 21st Century Tech for June 14, 2013
lenrosen4
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June 14, 2013
3
Cities
Society and Politics – Part 4: Getting Change Done
lenrosen4
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May 1, 2013
1
Cities
Al Gore’s “The Future” More About the Present and the Past
lenrosen4
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April 28, 2013
0
Agriculture
Urban Landscapes: A Grocery Chain in Brooklyn is Growing Local
lenrosen4
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April 20, 2013
1
Cities
In 2025 630 Million of Us Will Live in 37 Megacities
lenrosen4
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March 6, 2013
0
Cities
Society and Politics in 2100 – Part 1: Speculations on a Very Different World
lenrosen4
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February 24, 2013
0
Cities
Environment & Communications Update: The News from China
lenrosen4
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January 17, 2013
0
Cities
Human Resolutions for Lifeboat Earth in 2013
lenrosen4
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December 27, 2012
0
Cities
Urban Landscapes Update: A Developing World Solution to Urban Migration in the 21st Century
lenrosen4
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December 10, 2012
1
Cities
A Personal Climate Change Update: Climate Change Adaptation Project Advises My City to Prepare for the Worst
lenrosen4
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November 20, 2012
0
Automobiles
Gizmos and Gadgets – An Electric Car You Can Fold Up
lenrosen4
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November 15, 2012
1
Biomass
Materials Science Update: The Plastic Problem and a Plastic Solution
lenrosen4
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November 13, 2012
3
1
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