Renewable energy resources will be increasingly important as fossil fuel stocks dwindle. Nanowire solar cells can be arranged in a "solar tree" structure to increase efficiency. A solar tree is like a tree that produces energy from solar panels on its branches instead of leaves through photosynthesis. It has advantages over traditional solar panel systems by requiring less land and having lower maintenance while providing power for homes, businesses and street lights in an environmentally friendly way. The use of nanowires in the solar cells increases their absorption of light and efficiency.