Greenhouse gas emissions


In 2002, Alcoa signed an agreement with Québec’s Ministère du Développement durable, de l’Environnement et des Parcs (MDDEP) to reduce its greenhouse gas emissions (GHGs).  The five-year agreement covered the 2002-2007 period, and Alcoa met all of its targets.  In 2008, we signed a new voluntary reduction agreement for the 2008-2012 period, and have since also been subject to the province’s cap-and-trade system regulations.


The greenhouse gas inventory is completed based on the Règlement sur la déclaration obligatoire de certaines émissions de contaminants dans l’atmosphère (RDOCÉCA) protocol established with the MDDEP.  Our performance is audited annually by a third party.


Since 2001, the base year for the first reduction agreement, emissions have decreased by 32%.  Part of this decrease is attributable to the shutdown of one of the Söderberg potrooms in Baie-Comeau in November 2008.In 2012, direct GHG emissions rose slightly due to a deterioration in anode consumption and an increase in anodic effects at the Baie-Comeau and Bécancour smelters (see Perfluorocarbon (PFC) Emissions).


In 2012, indirect GHG emissions associated with the production of electricity needed for our operations were just over 100,000 t CO2e, or approximately 5% of our total emissions (direct + indirect).