I wrote this post yesterday, when I was a few minutes early for the start of an event at the downtown Los Angeles office of the Nature Conservancy. I had come into the city for four separate meetings, of which…
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I wrote this post yesterday, when I was a few minutes early for the start of an event at the downtown Los Angeles office of the Nature Conservancy. I had come into the city for four separate meetings, of which…
One of the most common ways to create an energy efficient house is by sealing it so that air can neither come in or out. This way, heaters or air conditioner won’t work as hard to either warm or cool…
It’s time to launch my second book, Is Renewable Really Doable? on Amazon.com. The big day: March 15, 2012. I hope you will mark your calendar, and buy the book on that date. To help generate interest in the subject,…
People need direct and clear instructions, like road signs or charts in a doctors office. A speed limit sign doesn’t say “Slow speed by 20%” when entering a school zone. It says “Do not exceed 20 mph”. If a doctor…
Frequent Commenter John F. Robbins writes this marvelous response to the 2GreenEnergy survey on renewables: The most missing question or comment in your survey and most of this blog is how to move away from the current energy-guzzling nature of…
Question: Approximately what percentage of the theoretical maximum amount of energy of the wind, flowing past the familiar three-blade turbines, is extracted and moved into the turbine shaft? Answer: Can be found at http://2greenenergy.com/cool-guess-answers/8732. Relevance: We come across numerous attempts…
My friend Geoffrey Nicholson comments my post “Renewable Energy and Basic Physics”: Craig, I couldn’t agree more. Other than geothermal energy, all the other sources of energy available to us originally came from solar energy and with a rather lossy…
I just got off the phone with a man I think of as “one of the good guys.” Jim Riggins, retired from the Air Force, now volunteers to “spread the gospel” of the National Solar Tour, through his work at…