"Solar panels," Marjorie says, her tone full of disbelief.

"Does that mean…?" Emily looks at me.

"Electricity." I grin.

Tom resumes leading the way, and I'm more eager than ever to get inside. The closer we get, the more I realize how similar the buildings are. They're each two stories with no porch, just three cement steps leading to the front door. There are two windows on either side of the door, and a small, brick chimney juts out from the ...