The fear of climatic catastrophes is an ancient one and not unlike our fear of strangers. In the past, people believed that the climate almost always changes for the worse, and only rarely for the better - God's punishment for sinful behavior.

The fear of climatic catastrophes is an ancient one and not unlike our fear of strangers. In the past, people believed that the climate almost always changes for the worse, and only rarely for the better - God's punishment for sinful behavior.

Unfortunately many scientists see themselves too much as priests whose job it is to preach moralistic sermons to people. This is another legacy of the 1968 generation, which I happen to belong to myself. In fact, it would be better if we just presented the facts and scenarios dispassionately - and then society can decide for itself what it wants to do to influence climate change.

We can no longer completely avoid anthropogenic climate change. At best, limiting the temperature rise to two degrees is just about possible, according to optimistic estimates. That's why we should spend more time talking about adjusting to the inevitable and not about reducing CO2 emissions. We have to take away people's fear of climate change.

Unfortunately, some scientists behave like preachers, delivering sermons to people. What this approach ignores is the fact that there are many threats in our world that must be weighed against one another. If I'm driving my car and find myself speeding toward an obstacle, I can't simple yank the wheel to the side without first checking to see if I'll instead be driving straight into a crowd of people. Climate researchers cannot and should not take this process of weighing different factors out of the hands of politics and society.

It is in fact necessary to reduce CO2 emissions. There is no reason why we shouldn't spend our vacations on (the North Sea island of) Sylt instead of in the Seychelles, or drive more economical cars - for the sake of preserving increasingly scarce resources if nothing else. But that won't enable us to stop climate change. As long as China, India and the United States continue the way they have been, what we Germans do is more or less irrelevant.

There is no last word in research, and that includes climate research. It's never the truth that scientists offer, but only our best possible approximation of reality. But that often gets forgotten in the way the public perceives and describes our work.