Its estimates suggest that total Brazilian GHG emissions reached 1.57 tC02eq in 2013 - the highest emission levels since 2008. Emissions increased in all sectors, but most strongly from LULUCF and fossil fuel combustion. Ethanol in fuel combustion produces less CO than gasoline and leads to lower NOx and possibly PM10 concentrations, but results in greater emission of aldehydes and higher ground-level ozone.