Ikon B was charged into the R-12 system with only a change of lubricant, from mineral oil to polyol ester. The system ran flawlessly for a total of 40 hours in six test runs. The Principle of Prudence tells us that, in a vital system, one should not take actions of which one is uncertain of the consequences. There are various measures of how intensely the Earth. On the issue of global warming, for example, the likeliliood of significantly increased temperatures is hotly debated, but the potential consequences of such warming are without doubt extremely disruptive.
Risk is the probability of occurrence multiplied by the severity of the consequences.
Therefore even if the probability of occurrence is low, the fact that the potential consequences are so great makes prevention and mitigation worthwhile. And remember the Principle of Prudence. We have no way of knowing how far the Earth. Significant numbers of people are now convinced that sustainable development practices are needed to limit human impact on the Earth. Each major principle contains within it a number of goals to be achieved.