(25)The energy sector accounts for approximately 22 % of direct greenhouse gas emissions in the Union and for approximately 75 % of those emissions when taking into account the use of energy in other sectors. It thus plays a key role in climate change mitigation. The energy sector has significant potential to reduce greenhouse gas emissions, and several activities in that sector act as enabling activities that facilitate the transition of the energy sector towards renewable or low-carbon electricity or heat. It is therefore appropriate to establish technical screening criteria for a wide range of activities related to the energy supply chain, ranging from electricity or heat generation from different sources, through transmission and distribution networks to storage, as well as heat pumps and the manufacture of biogas and biofuels.