Nov 22, 2011
Posted in Science at 5:23 pm by David Bradley -- 4 Comments; add yours
It’s a question I’ve asked several times, indirectly on Sciencebase – is renewable sustainable or just a pipedream for blue-skies thinkers?
Dawn Stover suggests that it may well be: Renewable energy sounds so much more natural and believable than a perpetual-motion machine, but theres one big problem: Unless youre planning to live without electricity and motorized transportation, you need more than just wind, water, sunlight, and plants for energy. You need raw materials, real estate, and …
Mar 16, 2011
Posted in Science at 10:00 am by David Bradley -- Click to comment
How Radiation Threatens Health – Why and how does exposure to radiation make you ill? What levels of exposure are dangerous and what levels are lethal?
Fukushima is a triumph for nuke power – Quake + tsunami = 1 minor radiation dose so far, says El Reg. Tragic as recent events in Japan have been. We should be building more nuclear reactors not fewer. Global warming caused by burning more and more fossil fuel …
Oct 22, 2009
Posted in Science at 2:00 pm by David Bradley -- 5 Comments; add yours
Right, the kettle is on for a morning brew and apparently our household is using 3.07 kilowatts. That will include the chest freezer in the garage, the refrigerator in the kitchen, the electric kettle, my laptop and wireless network, oh and a little device sitting on my desk right now that’s monitoring all those electrons as they speed through the mains supply cable.
The monitor …
Sep 2, 2009
Posted in Science at 1:00 pm by David Bradley -- 8 Comments; add yours
Biofuels are not much better than fossil fuels in terms of the impact on atmospheric pollution levels and effects on climate change, according to Mark Jacobson professor of civil and environmental engineering at Stanford University. This is especially true when making claims about the sustainability of biofuels in comparison with hydrogen fuel cells and battery-driven electric vehicles charged up using solar, wind, tidal or other truly renewable energy sources.
To quote from his web page, the …
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