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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
-
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
Cities
Satellites Tell Us That Sea Levels Are Rising Faster Than Previously Thought
lenrosen4
-
April 21, 2015
1
Cities
$89 Trillion Investment Needed to Transition to Low-Carbon Economy
lenrosen4
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April 19, 2015
3
Cities
228 Cities Set Emission Reduction Targets – Fort Collins, Colorado Leads the Pack
lenrosen4
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March 29, 2015
0
Agriculture
Wars Over Water – Our Near Future
lenrosen4
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March 23, 2015
0
Cities
Gizmos & Gadgets: Blancride Fills Empty Car Seats
lenrosen4
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March 8, 2015
0
Energy/Industry
Indonesia – The World’s 6th Largest GHG Emitter Faces Coal Energy Challenge
lenrosen4
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March 1, 2015
1
Cities
Writing From Florida About Freshwater
lenrosen4
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February 13, 2015
2
Cities
Extreme Heat Still Burning Australia in the Summer of 2015
lenrosen4
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February 11, 2015
0
Cities
Boston Issues Action Plan to Combat Rising Sea Levels and CO2
lenrosen4
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January 20, 2015
1
Agriculture
The Collapse of Western Civilization – Speculation on Our Future
lenrosen4
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January 12, 2015
1
Cities
Miami Beach’s Answer to Rising Sea Levels – More Waterfront Condos
lenrosen4
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December 23, 2014
0
Artificial Intelligence
Singapore to Launch Autonomous Vehicles in 2015
lenrosen4
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December 23, 2014
0
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