Eurostat, Luxembourg. 29012311 (01/1995-12/2003) But-1-ene and but-2-ene for use as a power or heating fuels: CN 29012311 /Imports /Unit = Quantities in tons /Partner: Intra-eur /Reporter: European Union /29012311:But-1-ene and But-2-ene for use as a Power or Heating Fuels.