Christian Science Monitor: Energy efficiency is a "key mitigation strategy" in keeping global carbon emissions within a safe range through the end of the century, according to a report issued Sunday by the United Nations' Intergovernmental Panel on Climate Change (IPCC). In the near term, it may be the most immediate and inexpensive way to curtail emissions while more costly and complex solutions get under way.
Smarter energy use alone won't solve global warming. The world will also need to quickly shift to carbon-free...