I would like to get a solar birdbath but I really don't know if the cost is worth it since I live in western NY. Any info would be greatly appreciated.

previous question left at my added detail that my calculation is 0 Billion to build the 100 square miles needed to replace all imported oil used for fuel. Should we invest, over 10 years, that amount once, versus paying that amount every year for import fuel? See previous question for assumptions and billr’s answer and calculations

How to prove geothermal power plant does not violate the second law (especially in mathematic)
I know that it is a close system and it obey the internal energy conservation. But I hardly express it into mathematical to make it a stronger statement. Anyone can help please. Thank You.

This is the actual DVD I have. Please watch all 10 videos before trying this yourself and BE CAREFUL. TOOLS ARE DANGEROUS. WARNING WARNING DO AT YOUR OWN RISK:-) We use pine for our blades but there are better woods available. If you use Pine, seal with a water sealer then apply a clear gloss enamel spray. This basically waterproofs the blade.

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