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21st Century Tech Blog
Science, Technology and the Future
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Energy/Industry
Perovskite Photovoltaics Leaving Silicon In The Dust
lenrosen4
-
May 30, 2025
Energy/Industry
Perovskite Solar: The Technology That’s Changing How We Power Small Devices
lenrosen4
-
May 28, 2025
Renewable
Solar Energy Technology Is Going “Perovskite”
lenrosen4
-
January 18, 2025
Solar Energy
A New Look At The Viability Of Solar Roads
lenrosen4
-
November 4, 2024
Energy/Industry
Solar Energy is Popping Up in Some Very Unusual Places
lenrosen4
-
April 17, 2024
Energy/Industry
Energy Update: The Island Nation of Tokelau Goes Solar – Other South Pacific Islands to Follow
lenrosen4
-
August 4, 2012
0
Automobiles
Headlines at 21st Century Tech for August 3, 2012
lenrosen4
-
August 3, 2012
2
Energy/Industry
Environmental Technology Update – Artificial Photosynthesis – Unlimited Power and Carbon Capture
lenrosen4
-
August 1, 2012
2
Energy/Industry
Energy Update: Renewable Wave and Tidal Power Getting Big Plays in U.S., Australia and Europe
lenrosen4
-
July 31, 2012
2
Robots & Robotics
Our Space Future in the 21st Century – Part 3: From Space Tourism to a Town of 10,000
lenrosen4
-
July 24, 2012
11
Energy/Industry
Energy Update: Solar Power Isn’t Just About Electricity – Now Providing Air Conditioning
lenrosen4
-
July 21, 2012
4
Energy Conservation Technology
Transportation Update: New Marine Technologies Coming to Tanker and Cruise Fleets
lenrosen4
-
July 19, 2012
0
Energy Conservation Technology
Energy Update: Solar is Taking Off According to this BP Report
lenrosen4
-
July 10, 2012
0
Energy/Industry
Energy Update: Home Energy Storage Technology Goes Commercial
lenrosen4
-
July 8, 2012
0
Agriculture
Headlines at 21st Century Tech for June 22, 2012
lenrosen4
-
June 22, 2012
2
Agriculture
Rio+20: A Report Card On How We Are Doing So Far?
lenrosen4
-
June 21, 2012
0
Automobiles
Transportation and Energy Update: Some Big Numbers to Ponder and a New Fuel Source
lenrosen4
-
June 16, 2012
0
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