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21st Century Tech Blog
Science, Technology and the Future
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Donald Trump is the Face of Environmental Destruction And His Own Tipping Point
lenrosen4
-
April 28, 2025
Environment
Climate Stories You Need To Know About: Bad, Barking Mad, And Hopeful
lenrosen4
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April 26, 2025
Environment
X Prize Announces Carbon Removal Grand Prize Winner
lenrosen4
-
April 23, 2025
Energy/Industry
55 Years Later Earth Day Is Still Being Ignored By The Vast Majority
lenrosen4
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April 22, 2025
Artificial Intelligence
New Google AI Allows Humans To Have Conversations With Dolphins
lenrosen4
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April 16, 2025
Agriculture
The Biggest Impediment to Humans Going to Mars is Food Not Whether SpaceX’s Starship Can Fly
lenrosen4
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November 19, 2023
1
Geoengineering Science and Technology
Could Adding Crushed Rock to Soil Lower Global Atmospheric Temperatures?
lenrosen4
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November 14, 2023
0
Agriculture
Where We Should Be Seeking Advice in a Hotter, Drier World
lenrosen4
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November 10, 2023
0
Material Science
New Aerogel Film Can Make Buildings Cooler
lenrosen4
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November 9, 2023
0
Climate Change Science
On the Eve of COP28 There Are Lots of Alarm Bells About Climate Change Going Off with the Latest Rung by James Hansen
lenrosen4
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November 8, 2023
0
Environment
Pacific Island Nations Are Forcing the World to Redefine the Meaning of Country
lenrosen4
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November 4, 2023
1
Environment
Is Putting a Price on Carbon About to Die as the World is Distracted by Other Crises Other Than Climate Change?
lenrosen4
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November 2, 2023
0
Energy/Industry
How Much Carbon Needs to be Drawn Down to Keep the Thermostat from Rising Above 1.5 Celsius?
lenrosen4
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November 1, 2023
0
Energy/Industry
Why Waste Chicken Feathers Today When You Can Use Them to Make Diapers and Fuel Cells?
lenrosen4
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October 26, 2023
0
Cities
What Happens When Your City’s Water Supply is Compromised?
lenrosen4
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October 23, 2023
0
Climate Change Science
Humanity Should Be Proud in Reaching the 1.5 Celsius Atmospheric Temperature Rise Well Ahead of Climate Forecasts
lenrosen4
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October 22, 2023
0
Environment
The First Big Environmental Problem We Thought We Had Solved Has Come Back to Bite Us
lenrosen4
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October 20, 2023
0
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“Whoa Nelly” May Soon Be What You Say To Your Robot Horse
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Donald Trump is the Face of Environmental Destruction And His Own Tipping Point
April 28, 2025
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