Chemical additives for treatment and removal of exhaust fumes; urea for treatment and removal of exhaust fumes; liquid urea for treatment and removal of exhaust fumes; urea used for converting nitrogen oxides in exhaust fumes to nitrogen gas and water; liquid urea used for converting nitrogen oxides in exhaust fumes to nitrogen gas and water; granular urea used for converting nitrogen oxides in exhaust fumes to nitrogen gas and water; selective catalytic reduction fluids used for reducing nitrogen oxides in exhaust fumes; selective catalytic reduction fluid additives used for reducing nitrogen oxides in exhaust fumes; fertilizers; flour for industrial purposes; industrial chemicals; chemical preparations for industrial or scientific purposes; surfactants; adhesives for industrial purposes; artificial sweeteners; plant growth regulating preparations; soil conditioning preparations; microorganisms other than for medical purposes; ceramic glazings; dolomite for industrial purposes; chemical test paper; unprocessed artificial resins; paper pulp; lithium; chemical preparations for use in photography; antifreeze; chemical compositions for the manufacture of technical ceramics