– Commonly used benchmarks are the current climate or the pre-industrial climate situation. Norway will probably experience increased precipitation, more flooding, more frequent landslips and rising sea level, and these physical changes and the uncertainty associated therewith constitute risk factors. Many of the physical processes happen very slowly, from a human perspective. Even if net global emissions were to be reduced to zero within a short space of time, it may therefore take a very long time for the climate system to arrive at a new equilibrium.