Reuters: Squeezing more productivity out of the energy that industries, homes and vehicles burn is the most economical way to stifle rising energy demand and control output of planet-warming gases, according to a new report from the McKinsey Global Institute. For decades, many countries have mostly invested in finding more supplies of oil, gas and coal to meet the rising energy needs of growing populations, but as energy costs and global warming concerns rise, interest in investing in ways to …