The reported critical load databases were proposed to be used , as appropriate , in support of the review of the Protocol on Heavy Metals and the Protocol to Abate Acidification , Eutrophication and Ground-level Ozone . Depositions of cadmium , lead and mercury were calculated by EMEP Meteorological Synthesizing Centre - East ( MSC-E ) with officially reported emissions , including adjustments made by the TNO Netherlands research institute for 2000 , and projections for 2020 with the current legislation scenario ( CLE-2020 ) ; Acidifying and eutrophying depositions were calculated by the Centre for Integrated Assessment Modelling using results from the Meteorological Synthesizing Centre - West and the baseline scenario of the Clean Air for Europe thematic strategy of the European Commission for 2000 ( CLE-2000 ) and 2010 ( CLE-2010 ) .