Passage: Airbus has committed to the "Flightpath 2050", an aviation industry plan to reduce noise, CO2, and NOx emissions.Airbus was the first aerospace business to become ISO 14001 certified, in January 2007; this is a broader certification covering the whole organisation, not just the aircraft it produces.In association with Honeywell and JetBlue Airbus has developed a biofuel to reduce pollution and dependence on fossil fuels, claiming that this has the potential to replace up to a third of the world's aviation fuel. Algae-based biofuel absorbs carbon dioxide during growth and does not compete with food production. This alternative may be commercially available by 2030 but algae and other vegetation-based fuels are in an early stage of development and fuel-bearing algae has been expensive to develop.  Airbus offers delivery flights to airlines using a 10% biofuel blend in standard engines. The fuel does not cut carbon emissions but is free of sulphur emissions and demonstrates that the fuel could be used in commercial flights in unmodified engines.

Question: What type of emissions are still present?
carbon emissions