The AEL Tracker database contains advanced energy legislation across all 50 states. Advanced energy encompasses energy efficiency, demand response, natural gas electric generation, solar, wind, hydro, nuclear, electric vehicles, biofuels and smart grid. The database also includes other legislation that would either reduce or increase the market share for advanced energy. AEL Tracker organizes legislation into the following policy categories: Electricity Generation; Energy Efficiency; Financing; Regulatory; Natural Gas; Emissions; Transportation; Infrastructure; Economic Development; Other Energy. In total, the Tracker database provides current legislative language, recent actions, bill sponsor information, and policy trend analysis.