In a pessimistic scenario called no action or &quot;no change&quot;, GHG emissions continue to increase rapidly throughout the 21st century. In the optimistic scenario, Mexico will reduce its black carbon emissions by at least 51% and its GHG emissions by 22% by 2030, and would continue on that path until the end of the century. Both scenarios have as a starting point the mitigation and adaptation commitments to climate change (Nationally Determined Contribution, CND) that would be executed mainly during the 2020-2030 period. for the country. It also compares what would happen in an optimistic scenario, that is, if Mexico and the world substantially meet their emission reduction commitments by mid-century, with additional reductions by 2100. In this section, two lines of work are developed that account for the economic effects of climate change, on the one hand, and the quantification of the investment amounts required to deal with such effects, on the other. Specifically, these two lines of work are: