The 18th annual National Solar Homes Tour will once again feature four Blount County homes. Tours are Saturday, Oct. 2, and Sunday, Oct. 3. Featured are a straw-bale home, a clerestory home, an underground home, and an expanded yurt home where solar hot water, solar electricity, and solar home design are utilized. Also featured are solar ovens, solar clothes dryers, and a solar lawnmotor. For more information or to register, call 429-4120 or email martha.1645@GreenIrene.com.