Business Week: For many, Europe`s stance on energy policy and climate change appears united. The European Commission has announced targets of a 20% reduction in carbon dioxide emissions and 20% electricity generation from renewables all by 2020 (the so-called 20-20 by 2020). Yet behind these objectives, there are wide divisions between European countries on how best to tackle global warming and energy security. Just how big these differences are was made clear by a recent report by consultants …