id	keyword
eurjchem-1411	production
eurjchem-1411	acid
eurjchem-1411	bat
eurjchem-1411	emission
eurjchem-1411	fertilizer
eurjchem-1411	process
eurjchem-1411	levels
eurjchem-1411	table
eurjchem-1411	energy
eurjchem-1411	ammonia
eurjchem-1411	techniques