Homes built today are 30% more energy efficient than a decade ago. However, many older homes have not been upgraded, representing an opportunity for contractors to perform energy audits. Energy audits assess a building's energy usage and propose solutions to reduce costs and consumption. While homeowners are interested in savings, the environmental benefits also appeal to younger, environmentally-minded homeowners. Performing commercial energy audits can help businesses significantly cut lighting costs. With government incentives and an emphasis on sustainability, the energy auditing industry represents an growing business opportunity for contractors.