H2so - acid rain 1989 goUacHe 24 x 20,5 in. /74 x 52 cm. pollUTion in TWo-fold 1984 goUacHe 20 x 25,5 in. /50 x 65 cm. ossUary 1990 goUacHe 20 x 28 in. /50 x 72 cm. 55