While most homeowners would in theory like to generate their own wind or solar power, many are put off not just by cost, but by the aesthetic impact of wind turbines and solar panels. Aiming to resolve that problem are smart engineers who are creating new options that blend in with their environment. Two promising examples: rooftop wind turbines that almost disappear along the apex of a sloping roof, and solar panels shaped like traditional clay roof tiles. Plenty of opportunities here over the next decade, both in distribution and in the development of similar products.