Reuters: The world needs a shift as radical as the Industrial Revolution to cut greenhouse gas emissions by 2050 while safeguarding economic growth, the McKinsey Global Institute said on Thursday. It said in a study that a modern “carbon revolution” to curb global warming would require a tenfold rise by 2050 in the level of economic output for every tonne of greenhouse gases emitted, mainly by burning fossil fuels. “This is comparable in magnitude to the labour …