Our results highlight the role of older technologies accounting for almost 80% of the emissions of all species. As a consequence, the MABA exhibits higher specific emissions (ton TJ
1
) than developed countries, with figures two times higher for criteria pollutants. This finding indicates the need of systematically updating this inventory as the replacement of most polluting technologies would certainly have a major impact on the emission levels. Specific emissions (ton km
2
Population with UBN (%)
Fig. 8. Correlation between the number of vehicles per capita and the Unsatisfied Basic Needs index for the districts of the metropolitan area of Buenos Aires (black dots) and the provinces of Argentina (circles). The 95% ellipse confidence is shown in dotted line.
) confirm the MABA as a concentrated emission focus, as emissions at megacity level are 2e4 orders of magnitude higher than those at country level.