Emerson has shown industry-leading innovation in compressor technology that has led to substantial increases in the efficiency of air conditioning systems around the world. Residential systems in North America are now over 60% more efficient than two decades ago, equivalent to the power generated by 17 one-gigawatt power plants. Emerson is also partnering with manufacturers to phase out ozone-depleting refrigerants in systems by 2010 and develop new compressors that use more environmentally-friendly alternatives while maintaining reliability.