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21st Century Tech Blog
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Society
Screens, Social Media And Mental Health: What Research Shows
lenrosen4
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November 20, 2024
Energy/Industry
Governments Spending $7 Trillion Annually To Subsidize Fossil Fuels
lenrosen4
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November 15, 2024
Editor Picks
Canada Celebrates The End Of War Each November 11th
lenrosen4
-
November 11, 2024
Editor Picks
The Myth That Humans Can Be Persuaded By Facts
lenrosen4
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November 3, 2024
Climate Change Science
With COP 29 In Two Weeks A Reminder To Delegates – We Are On Pace For A 3.1 Celsius Rise In Atmospheric Temperatures
lenrosen4
-
October 27, 2024
Electric Vehicles
Energy Update: An Environmental Engineer’s 2030 Forecast
lenrosen4
-
May 16, 2013
1
Climate Change Science
Energy Update: No Limit it Seems to U.S. Oil Reserves Says Geological Survey
lenrosen4
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May 8, 2013
2
Cities
Society and Politics – Part 4: Getting Change Done
lenrosen4
-
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
Gizmos & Gadgets: Meet Open Source Ecology
lenrosen4
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April 22, 2013
0
Nations
Society and Politics in 2100 – Part 3: Democracy, Nations, and Technology
lenrosen4
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April 10, 2013
3
Nations
Mobile Phones Spawn a Revolution in Entrepreneurship in East Africa
lenrosen4
-
March 7, 2013
0
Agriculture
Environment Update: Nitrogen Pollution as Problematic as CO2
lenrosen4
-
March 4, 2013
0
Climate Change Science
Energy and the Environment: When Will We See Humans on Both Sides of the Divide Have a Meeting of Minds?
lenrosen4
-
February 28, 2013
1
Nations
Society and Politics in 2100 – Part 2: Universal Connectivity Equals Direct Democracy
lenrosen4
-
February 27, 2013
2
Energy Conservation Technology
Environment Update: One More Sequestration Project Bites the Dust in Alberta
lenrosen4
-
February 26, 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
1
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