Mr Perrez, you look back on 13 busy years as one of the leading climate negotiators. When you started after the Copenhagen summit, climate diplomacy was in ruins. Where does it stand today?
Franz Perrez: Even though we have taken a significant step forward with the Paris Agreement, we are not yet where we should be. In Copenhagen in 2009, the attempt to hold all countries with high emissions to account failed. In 2015, the Paris Agreement then succeeded in involving all countries in principle: All countries must formulate climate targets. These targets now need to be raised further. However, large emitters such as China and Saudi Arabia are hiding behind their status as developing countries.