Today's editorial at the New York Times covers the EU's ambitions on curbing climate change.
[...] Europe is moving faster and more aggressively than any other large economy to limit global warming to no more than 2 degrees Celsius (3.6 degrees Fahrenheit) above the preindustrial level — a level formally acknowledged at the Copenhagen summit meeting in 2009 as the point beyond which the impacts of climate change could become unacceptable. The rest of the world needs to match Europe’s ambitions.
The editorial, though, mentions another aspect of the challenges of the EU transition toward a more sustainable energy solution, namely that there is actually no common market for energy in the EU. I.e. surplus energy from, say, Portugal cannot be used in Denmark or Sweden. If the EU is to become even more dynamic it must work toward creating a common energy market like the single market for goods and services which is currently (more or less) in place.