OVER the past few years the questions have been asked ever more forcefully whether global climate changes occur in natural cycles or not, to what degree we humans contribute to them, what threats stem from them and what can be done to prevent them. Scientific studies demonstrate that any changes in temperature and energy cycles on a planetary scale could mean danger for all people on all continents.

It is also obvious from published research that human activity is a cause of change; we just don’t know how big its contribution is. Is it necessary to know that to the last percentage point, though? By waiting for incontrovertible precision, aren’t we simply wasting time when we could be taking measures that are relatively painless compared to those we would have to adopt after further delays?...

The end of the world has been anticipated many times and has never come, of course. And it won’t come this time either. We need not fear for our planet. It was here before us and most likely will be here after us. But that doesn’t mean that the human race is not at serious risk. As a result of our endeavors and our irresponsibility our climate might leave no place for us. If we drag our feet, the scope for decision-making — and hence for our individual freedom — could be considerably reduced.

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