One of the highest-impact decisions has been, without doubt, the enforcing of a new standard related to sulphur oxides emissions. Decreed by the International Maritime Organisation and in force from 01/01/2020, it establishes a new limit on the contents of sulphur in fuel used in boats, from 3.5 % mass/current mass to 0.5 %.
However, the answer for many shipping companies has been the installation of scrubbers or gas scrubbers. This alternative allows the same type of fuel to be used, but reducing sulphur emissions. The problem is that, in many cases, surpluses are poured into the sea, which may put marine biodiversity at risk.