ASI’s independent third-party Certification

ASI has developed an independent third-party Certification program to ensure sustainability and human rights principles are increasingly embedded in aluminium production, use and recycling. ASI’s Performance Standard and Chain of Custody Standard are designed to link responsible production with responsible sourcing, and thus support increased emphasis on sustainability in procurement practices.

More about Voluntary Standards Initiatives

ASI is a Code Compliant Member of the ISEAL Alliance, the global membership organisation for credible sustainability standards, whose mission is to strengthen sustainability standards systems for the benefit of people and the environment. Other members include Forest Stewardship Council, Rainforest Alliance, Responsible Jewellery Council and Marine Stewardship Council. ASI is working toward full compliance with the criteria in ISEAL’s Codes of Good Practice for Standard-Setting, Assurance and Impacts.

Uses of aluminium

Aluminium’s applications include:

  • Transport: Lower GHG emissions through lighter vehicles and through its recyclability
  • Infrastructure: Bringing energy efficiency for cities and buildings in an energy constrained world
  • Packaging: Preserving food and medicines through its unique barrier properties.

The production of aluminium for use in these applications has direct and indirect impacts which are outlined below, as well as the role of ASI Standards in addressing these impacts.

Greenhouse gas emissions

Existing primary aluminium production processes are energy intensive by nature, in particular electrolytic smelting and thermo-chemical alumina refining processes.  As energy costs are a major part of overall production costs, improved energy efficiency is essential for the aluminium industry, both from an economic and environmental point of view. Improved energy efficiency will also reduce emissions, although efficiency gains alone are not enough to reduce emissions at the orders of magnitude required to avoid catastrophic climate change.

In addition to the GHG emissions from producing the electricity used in the smelting process (accounting for around 60% of all industry emissions globally) and from the electrolytic process itself (12%), aluminium production results in direct greenhouse emissions from fuel combustion in alumina refining (10%), casting and recycling processes (3%) and semi-fabrication (2%).  Raw materials and transport make up a further 7%.

Reduction of greenhouse gas emissions from energy-, material- and transport-related, as well as process-specific, sources are all required to deliver a 1.5 °C aligned aluminium sector.

ASI’s Role

The aluminium sector accounts for 1.1 billion tonnes of CO2 emissions, around 2 percent of the world-s total.  ASI has committed to a 1.5°C-aligned pathway for the aluminium sector.  Its GHG Working Group enables input from and engagement with climate change experts, members and stakeholders as the ASI’s Standards (and in particular its Guidance documents) evolve.

Around 60% of the aluminium sector’s GHG emissions are from the production of electricity consumed during the aluminium smelting process.  Decarbonisation will require all aluminium smelters to shift down the current emissions curve, particularly those currently using carbon-intensive sources of power.  ASI aims to incentivise this by providing Certification pathways for all smelters on the emissions curve, whilst ensuring clear, significant and time-bound emission reductions are demonstrated. 

Through the 2020-2022 Standards Revision, new threshold GHG emissions values for aluminium smelters are being proposed in the ASI Performance Standard. The ASI Chain of Custody Standard provides a mechanism for asset-level performance claims to be connected to metal flow. 

Principle 5 in the ASI Performance Standard addresses GHG emissions and, through the Standards Revision process, is referencing a 1.5°C aligned scenario for the aluminium sector.  The ASI Performance Standard includes two criteria for aluminium smelting processes (which are responsible for 80% of the industry’s emissions footprint). In the 2022 revised Standard, smelters starting production after 2020 must achieve a level of GHG emissions (Scopes 1, 2 and 3 categories 1, 3 and 4) below 11 tonnes CO2e per metric tonne of aluminium produced. Existing aluminium smelters that were in production before 2020 must achieve the 11 tonnes CO2e per metric tonne level by 2030. To put this in perspective, the current global average for aluminium ingot production is 16 CO2e per metric tonne.

Through implementation of its Standards, ASI aims to mobilise aluminium sector climate action in line with a 1.5°C limit on global temperature rise.  Assurance of such action is delivered via the ASI Certification program.


The vast majority of the world’s bauxite comes from surface mines in tropical areas, where bauxite occurs in horizontal layers, normally beneath a few meters of overburden. Bauxite mining involves disturbance of relatively large land areas, which can include areas of high biodiversity value.

Effective mitigation of biodiversity impacts from bauxite mining involves avoiding negative impacts to protected areas and areas with natural and critical habitats (including avoidance of invasive species), as well as rehabilitation of mined areas.

ASI’s role

ASI’s standards set good practice requirements for biodiversity assessment and management, no-go areas for World Heritage Sites, and rehabilitation with best available techniques.

ASI has committed to explore expansion of the ASI Performance Standard in the areas of ecosystem services and no-go areas ahead of the next revision process. A Biodiversity and Ecosystem Working Group is being established in early 2018 to enable input and engagement with biodiversity experts, members and stakeholders to be taken into account.

Recycling and material stewardship

Aluminium is 100% recyclable and experiences no loss of properties or quality during the recycling process. Recycling aluminium also uses only 5% of the energy used to created new aluminium and emits only 5% of the greenhouse gases. Approximately 75% of the aluminium ever produced is still in use today.

The majority of aluminium is used in products with very long use phases, for example transportation products that have a typical lifetime of 20 years or buildings with lifetimes of approximately 50 years.

Recycling of post-consumer scrap and waste requires a number of conditions, including the availability of systems to collect and sort used materials, and the adequate design of products that enable classification and recycling, among others.

ASI’s role

ASI’s standards place requirements on downstream companies that design and produce consumer and commercial goods to consider future recyclability and support society’s efforts to increase recycling.

Indigenous peoples' rights

Mining and mining-related activities (exploration, development, resource extraction, processing, transportation and waste disposal) often take place on, or near, indigenous lands. Mining or large-scale industrial development requires access to land and water that is often the basis of livelihoods for local communities. Major industrial developments can have significant adverse impacts on indigenous groups and/or vulnerable groups and individuals, affecting their rights to self-determination, infringing on their lands, territories and resources, and threatening their ability to maintain their culture, including their cultural heritage and recognition of their distinct identities.

ASI’s role

ASI has convened an Indigenous Peoples Advisory Forum (IPAF) as part of its formal governance structure. IPAF representatives liaise with both the ASI Board and Standards Committee on matters relating to standards setting, the ASI Complaints Mechanism, and the broader involvement of indigenous peoples in ASI’s programs. ASI’s standards set good practice requirements for respect of Indigenous Peoples Rights, Free Prior Informed Consent (FPIC), and sacred and cultural heritage.

Waste management

Between two and four tonnes of bauxite are required to produce one tonne of alumina. Once the alumina is extracted from the bauxite, the remaining bauxite residue is stored in landfills. Disposal of the bauxite residue is a challenging aspect of alumina production.

Aluminium smelters also generate significant quantities of solid waste. One of the main sources of waste production during the smelting process is ‘spent pot lining’ (SPL) from the relining of pots, which takes place every five-to-eight years. Leading companies minimise the generation of SPL by extending life times of the pots, and ensure proper handling of SPL waste through treatment or use by other industries, such as the cement industry.

ASI’s role

ASI’s standards set good practice requirements for both types of wastes, and encourages alternatives to landfill.