When comparing GHG emissions with the electricity generation curves (GWh) by type of source (Figure 41), it can be seen that the maximum emissions occur when the generation by hydraulic source decreases and the consumption of diesel and especially coal increases., as observed in 1999, 2008-2013 and 2015-2017. The opposite situation occurs in the periods 1990-1992, 2005-2006 and in 2014, where the increase in the water source and a decrease in the growth trend of the emissions of the subcategory are seen. It is worth noting the influence of the use of natural gas on GHG emissions in the period 1999-2006, where it is observed how GHG emissions decrease due to the increase in the consumption of natural gas as a result of the entry of a large supply of this fuel from Argentina, which displaces the consumption of coal and diesel. Likewise, since 2007 it has been observed how the cut off of natural gas supply by Argentina, accompanied by a lower water supply due to droughts, produces an increase in the consumption of diesel and coal; Initially, the main substitute was diesel because natural gas plants are mostly comparable with diesel. Subsequently, coal entered with greater force given its lower cost, which in turn increases GHG emissions, resuming the upward trend observed between 1990 and 1998. The decrease presented between the years 2008-2010 is mainly due to the economic crisis of the year 2008 together with the earthquake of the year 2010. While the drop in emissions presented in the year 2014 is related to the fact that 2013 was a very rainy year, which allowed the storage of large amounts of water, either by reservoir or in the glaciers of the mountains in the south of the country, thus increasing the supply of this generation for 2014. For the coming years, it is seen how emissions increase until 2016 due to the greater use of coal, to then decline in 2018. This is mainly due to the increase in the participation of NCRE sources (solar, wind, mini-hydro and geothermal) together with the return of natural gas for electricity generation. In addition, it is possible to appreciate how diesel is increasingly decreasing its share, motivated by the entry of renewable sources and its high price compared to other fossil alternatives