"Keep Our Air Clean" by Franco Costa, 1987 Signed Serigraph. Paper size: 37 x 26.5 inches; Image size: 31.5 x 23.75 inches; Edition Size: Unknown; Not Framed.; Condition: A: Mint.ATTENTTION INTERNATIONAL BUYERS, Please Note: Import duties, taxes, and charges are NOT included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.