One of the main tools for air quality management is the emission inventory of atmospheric air pollutants. The present work evaluated and quantified atmospheric emissions from vehicle sources for the state of Minas Gerais (Brazil). Using the top-down methodology, CO, NO_X, SO₂, NMHC, RCHO, and PM emissions were estimated for 2015. Of the six million vehicles accounted, 5291 t.year⁻¹ (tonne per year) of PM_2.5 was estimated, with the exhaust being the source that represented the highest emission rates (63.9%), followed by tire and brake wear (22.5%) and road surface wear (13.6%). NOx (117.708 t.year⁻¹) and CO (103.295 t.year⁻¹) were the most emitted pollutants. Light commercial vehicles were responsible for the emission of almost 64% of NMHC. Ethanol cars were significant contributors to RCHO (48.6%). The obtained results can assist in understanding the vehicular air pollutant emissions in regions with data scarcity, such as in Brazilian areas, and also contribute with improvements in scientific knowledge about vehicular air pollutant emissions in countries with the widespread use of biofuels.

空气质量管理的主要工具之一是大气污染物排放清单。目前的工作评估和量化了米纳斯吉拉斯州（巴西）车辆来源的大气排放。采用自上而下的方法，CO，NO _X，SO ₂，非甲烷总烃，RCHO和PM排放量估计为2015年的600辆万辆汽车中占，5291 t.year ^-1（每年吨）的PM _2.5，估计，废气是排放率最高的来源（63.9%），其次是轮胎和刹车磨损（22.5%）和路面磨损（13.6%）。NOx (117.708 t.year ^-1 ) 和 CO (103.295 t.year ^-1)是排放量最大的污染物。近 64% 的 NMHC 排放了轻型商用车。乙醇汽车是 RCHO 的重要贡献者（48.6%）。获得的结果有助于了解数据稀缺地区（例如巴西地区）的车辆空气污染物排放情况，也有助于提高广泛使用生物燃料的国家有关车辆空气污染物排放的科学知识。