Climate Protection

 

The intensity of our greenhouse gas (GHG) emissions in Latin America and the Caribbean increased in 2013, but we have made progress in reducing these emissions from our 2005 baseline.

 

Globally, Alcoa’s goal is to reduce total carbon dioxide equivalent intensity in the Global Primary Products business group (mining, refining, and smelting) by 30% by 2020 and 35% by 2030 from 2005 levels.

 

In 2013, we experienced a 7% increase in our GHG emission intensity compared to 2012. While we had a 5% decline in our direct GHG emissions during the year, our indirect GHG emissions increased 68%. This was mainly due to a 50% increase in the National Grid Emission Factor, which is determined by the Brazilian government. Compared to the 2005 baseline, we achieved a 4% decline in our GHG emission intensity.

 

Climate Protection Conveyer

A mid-air rope conveyer in Jamaica transports bauxite from a hillside mine, eliminating an estimated 160,000 metric tons of carbon dioxide emissions from trucks each year.

Our operations in Jamaica achieved a 7% reduction in GHG emission intensity in 2013 by reducing liquor flows through the refinery, reducing evaporator usage (hence steam consumption), and maximizing digester yields to get the most out of each cycle.

 

In Brazil, we saw a 7% decrease in direct emissions due to our minimization efforts. Our Poços de Caldas plant, for example, switched its fuel source from fuel oil to natural gas in 2013, reducing its GHG emissions by 6,000 metric tons during the year. We did experience an 8% increase in the GHG emission intensity at our Brazilian locations, primarily due to the emission factor increase.

 

In 2013, our Brazilian operations received the GHG Protocol Program’s gold certification for transparency in reporting and quantifying its audited emissions inventory.

 

Our operations in Suriname experienced a 3% increase in GHG emission intensity during 2013. This was mainly due to a 25% curtailment in digester capacity since 2012 that reduced production efficiency. Direct emissions declined 0.8% during the same period.

Greenhouse Gas Emissions
  Greenhouse Gas Emission Intensity
Metric tons of CO2e per ton of primary production
Direct Greenhouse
Gas Emissions

Metric tons of CO2e

Indirect Greenhouse Gas Emissions
Metric tons of CO2e

2009 3.53       4,089,385 216,457
2010 4.11       4,712,461 466,499
2011 3.83       5,083,595 281,098
2012 3.60       4,657,487 249,842
2013 3.85       4,435,782 420,128