. ▁By ▁ 2 0 0 8 , ▁the ▁plant ▁was ▁burning ▁ 1 0 0 % ▁Pow der ▁River ▁bas in ▁coal . ▁Rec ent ▁rail ▁up gr ades ▁to ▁the ▁Central ia ▁Power ▁Plant , ▁and ▁SO 2 ▁scr ub ber ▁up gr ades ▁to ▁ensure ▁plant ▁releases ▁less ▁poll ution , ▁will ▁ensure ▁the ▁plant ▁runs ▁for ▁at ▁least ▁another ▁ 1 5 – 2 0 ▁years . ▁Central ia ▁currently ▁burn s ▁coal ▁from ▁about ▁nine ▁ 1 1 0 - car ▁coal ▁trains ▁each ▁week ▁( i . e . ▁ 9 9 0 ▁full ▁coal ▁cars ). ▁ ▁Environment al ▁and ▁public ▁impact s ▁Ann ually , ▁this ▁coal ▁plant ▁em its ▁ 3 5 0 ▁pounds ▁of ▁mer cur y ▁poll ution , ▁making ▁it ▁the ▁state ' s ▁largest ▁single ▁source ▁of ▁mer cur y ▁poll ution . ▁Mercur y ▁poll ution ▁is ▁a ▁bio ▁cum ulative ▁ne uro to x in ▁which ▁causes ▁brain ▁damage ▁in ▁humans ▁and ▁is ▁especially ▁dangerous ▁for ▁children ▁and ▁pre gn ant ▁or ▁n urs ing ▁moth ers . ▁The ▁plant ▁also ▁em its ▁ 7 . 5 MM t CO 2 e , ▁making ▁up ▁a ▁large ▁portion ▁of ▁Washington ▁State ' s ▁total ▁CO 2 ▁em issions . ▁ ▁All ▁of ▁the ▁min ing ▁area ▁is ▁currently ▁being ▁rec laimed . ▁When ▁Trans Al ta ▁bought ▁the ▁plant ▁in ▁ 2 0 0 0 , ▁it ▁agreed ▁to ▁reduce ▁em issions . ▁It ▁installed ▁US ▁$ 2