Prague

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?

Maybe we should start considering our sojourn on earth as a loan. There can be no doubt that for the past hundred years at least, Europe and the United States have been running up a debt, and now other parts of the world are following their example. Nature is issuing warnings that we must not only stop the debt from growing but start to pay it back. There is little point in asking whether we have borrowed too much or what would happen if we postponed the repayments. Anyone with a mortgage or a bank loan can easily imagine the answer.

The effects of possible climate changes are hard to estimate. Our planet has never been in a state of balance from which it could deviate through human or other influence and then, in time, return to its original state. The climate is not like a pendulum that will return to its original position after a certain period. It has evolved turbulently over billions of years into a gigantic complex of networks, and of networks within networks, where everything is interlinked in diverse ways.