This number comes from the Centre for the study of democracies and the Centre for the study of energies and clean air. These bona fide, no doubt non-profit (taxpayer funded) organizations say that Czechia could shed its dependence on Russian oil and gas by importing gas from Norway, and buying LNG on the international market (did you know the latter is often also Russian?). Oil could be imported through a pipeline from Italy. Czechia is 60% dependent on Russian oil.