The Intergovernmental Panel on Climate Change (IPCC) released another important set of policy recommendations in Berlin this week. In light of the fact that heat-trapping emissions grew more quickly in the first decade of this century than in any of the three previous decades, we are reminded again that "business as usual" in the energy world isn't leading to a more stable climate.
Scientists have been telling us for years that to avoid dramatic disruptions in climate, the world needs to limit global warming to no more than two degrees Celsius (about 3.5 degrees Fahrenheit).
But we have collectively waited so long to start making serious cuts to emissions that the pressure is very much on: To stay within the "safe" levels of warming, we must lower greenhouse gas emissions by 40 to 70 percent by mid-century (with 2010 levels as the base point), and to near zero by the end of the century. Whoa!
The IPCC remains confident we can achieve these cuts, although the longer we wait, the more expensive it will be for all of us.
The report calls for policies that we at PennFuture have been recommending for years, recognizing that using less energy is as important as using clean energy. PennFuture played a keep role in enacting Pennsylvania's energy efficiency standard (Act 129) in 2008, and has been recommending to Harrisburg policymakers since then that we increase efficiency standards.
Although Pennsylvania's population isn't expected to change significantly in the decades ahead, global population seems likely to increase greatly, with billions of people simultaneously wanting to increase their standard of living -- both factors leading to potentially huge increases in energy demand. So, energy efficiency at the global level becomes ever more important.
As Youba Sokona (co-chair of the IPCC Working Group that released the report this week) points out, "The core task of climate change mitigation is decoupling greenhouse gas emissions from the growth of economies and population."
Take a look at PennFuture's new Clean Energy Wins report that offers a roadmap for how state government can grow Pennsylvania's economy while shrinking its carbon footprint.
Joy Bergey is federal policy director for PennFuture and is based in Philadelphia.
