Energy-saving ideas.
D003246:Conservation of Energy Resources / Q000191:economics*; D003247:Conservation of Natural Resources / Q000191:economics*; D003363:Cost Control; D005380:Financing, Government / Q000331:legislation & jurisprudence; D005579:Fossil Fuels; D008284:Maintenance and Engineering, Hospital / Q000191:economics*; D010414:Pennsylvania; D014481:United States