TY - JOUR AU - García-Gusano, Diego AU - Cabal, Helena AU - Lechón, Yolanda PY - 2015 DO - 10.1007/s10098-015-0923-z SN - 1618-954X UR - https://hdl.handle.net/11556/4786 AB - Even though significant NOx and SO2 emissions reductions have been observed in Spain during last decade, there is a strong commitment to keep reducing the levels of pollution in order to improve air quality standards. This work has been carried out to... LA - eng TI - Evolution of NOx and SO2 emissions in Spain: Ceilings versus taxes TY - journal article ER -