The transport sector accounts for 59% of GHG emissions, according to data for the year 2017. This is why the National Mobility Strategy is being drawn up with the aim of reducing emissions and respecting the hierarchy in the prioritisation of transport systems established in Law 21/2018, of 13 September, of promoting energy transition and climate change: firstly, to give priority to public transport and to promote non-motorised or assisted mobility; secondly, to promote electric motorised mobility or mobility from a low source of GHG emissions.