I am certain that the United States next year, under a new president - regardless whether it's Obama or McCain - will present an ambitious program promoting renewable energies and energy efficiency. Europe could quickly fall behind.

We will fight against any pro-nuclear power plan. And we will remind people that a change in the German nuclear consensus would stifle the development of sustainable energy and it would cost jobs. The SPD is the strongest among the opposition parties and we must take on this role with vigour.

My office has a view of low-cost housing, old East German prefabricated apartment buildings. It isn't an attractive view, but it's very helpful, because it reminds me to ask myself, whenever there is a decision to be made, whether the people who live there can afford our decisions.

Economically and politically, Germany is extremely stable. There are countries with functioning governments whose institutions don't work. My only concern is about Europe. There's a risk we will run out of time. We have been blessed with a pro-European French president, but we are also approaching the next elections for the European Parliament in 2019, and it will be important for pro-European parties present a credible answer to the anti-Europeans on the left and the right.

Less and less is the question being asked as to whether developments are taking place in a democratic and free way. Europe is in a phase in which this output is no longer sufficiently visible or tangible. Youth unemployment is still far too high, we still haven't solved our currency problem and living conditions in Europe are drifting apart. That is one reason why critics say that our Europe is based on yesteryear's model.

Countries that work with Europe should feel safer than they would if they worked with non-democratic regimes. Why isn't Europe building infrastructure in Africa instead of leaving it to the Chinese? Why haven't we succeeded in promoting the economic development of our neighbors in the Balkans, instead conceding these countries to growing Russian influence? In an uncomfortable world, we Europeans can no longer sit back and wait for the U.S.A.

The shadow of an exit of Greece from the euro zone takes on ever clearer shape, repeated apparently final attempts to reach a deal are starting to make the whole process look ridiculous. There is an ever greater number of people who feel as if the Greek government is giving them the run-around.