The trend of total gross emissions shows a decrease of 13.84% (23,281.89 Gg CO eq) between the average of the 2000-2016 time series with respect to the 1990-1999 series. Subsequently, an increase of 24.29% is observed in the years 2017 and 2018 compared to the 2000-2016 series; these emission levels are higher than the values reported for the first decade. The net annual average GHG emissions of category 3B Lands correspond to 97,206.45 Gg CO eq in the 1990-2018 series, which have an average of 109,288.89 Gg CO eq of gross emissions and -12,082.45 Gg CO eq in removals. Of the gross emissions, 73.30% (annual average) correspond to emissions from deforestation of natural forests. The largest emissions from category 3B Lands are reported in the 1990s. Starting in 2000, net GHG emissions decreased to the lowest historical level, reported in 2015. Subsequently, GHG emissions in this category increased to a maximum of 129,666.53 Gg CO eq in 2017. In 2018, 99,060 were registered..62 Gg CO eq of net emissions, corresponding to 122,247.09 Gg CO eq of gross emissions and -23,186.47 Gg CO eq of removals. Deforestation corresponds to 77.26% of the gross emissions of category 38 and 52.74% of the entire AFOLU sector in 2018. The behavior of the 2000-2015 time series is due to the reduction of emissions from the subcategories 381 Forest Lands and 383 Pastures, with 15.73% less compared to the decade of the 90s. These subcategories are part of category 3B Land, which historically contributes 70.31% of total AFOLU emissions (109,288.89 Gg CO eq). In the historical series of emissions, it is observed that the majority correspond to the land use and change of use sector associated with deforestation, with an average total of 80,110.28 Gg CO eq. (55.97% of the average net emissions of the AFOLU sector). It was established that the main direct causes of deforestation between 1990 and 1999 were related to the expansion of the agricultural frontier (especially due to extensive cattle ranch