SNC-Lavalin Group wins contract a contract from Brazilian mining giant Vale SA to modernize its nickel smelter complex in Sudbury, Ont., part of an overall $2-billion effort by Vale to slash sulphur dioxide emissions and dust and metal pollution at the mining site...Despite the new business, SNC-Lavalin remains dogged by questions over its business in Libya and whether its internal risk management and project control systems failed. [includes company response]