I think the whole basis for the European Union is that we have tried, as a collection of countries, to identify our common interests and to develop policy together to meet our common interests. Just as within a country you may have one region that is very well able to meet the target and another region that won't, but as a country you're able to meet the target because you can balance those against each other, so within the European Union we have some still developing countries that are still growing parts of their economy that are going to be very carbon-intensive, and we have others that are in a different position, so we can balance out. As a union, we can deliver certain targets that we can agree on between ourselves, and we can then, through an internal negotiation, work out how we are going to divvy that up. I think it's much more effective if we can act together for that reason.
Evidence of meeting #38 for Environment and Sustainable Development in the 40th Parliament, 2nd Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was targets.
A recording is available from Parliament.