[en] While science looks on the soon occurring taking into operation of the Large Hadron Collider (LHC), a by Germany cofinanced big device for the fundamental physical research at the European research center CERN at Geneve, with attention and high expectation, in some media voices become loud, which connect with the LHC aggravating anxieties. So by some people is prognosticied that in the operation small black holes arise, which grow in the following and could finally destroy the whole earth planet. The present contribution explains first the physical backgrounds and scientific goals of the experiment at the planned accelerator. It is then dedicated to the general political question, which neutral gremia and institutions check systematically potential environmental effects of new research devices in the area of immediate front of the taking into operation. A more strongly scientifically straightened appendix enters especially four different variants of ''extinction scenarios'', explains the physical backgrounds and corresponding theories and tries to estimate the real threatening of the four discussed scenarios. As result it is shown that in all probability no concrete risk exists