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Continue to ChatDNR to teach architects and builders about using the sun for power https://www.radioiowa.com/2002/11/05/dnr-to-teach-architects-and-builders-about-using-the-sun-for-power/
DNR to teach architects and builders about using the sun for power https://www.radioiowa.com/2002/11/05/dnr-to-teach-architects-and-builders-about-using-the-sun-for-power/