The oil bust has created the longest period of declining investment in the global energy industry in nearly half a century, according to a new report from the International Energy Agency. “We see a broad shift of spending toward cleaner energy, often as a result of government policies,” Fatih Birol, the IEA’s executive director, said in a statement . “Our report clearly shows that such government measures can work, and are key to a successful energy transition. But while some progress has been achieved, investors need clarity and certainty from policy makers. Governments must not only maintain but heighten their commitment to achieve energy security and climate goals.” Oil and gas investment declined by 25 percent in 2015 to just $583 billion. The declines are expected to continue through this year, falling by another 24 percent to $450 billion. By way of comparison, oil and gas investments […]