Climate and Clean Air Coalition

The Climate and Clean Air Coalition, formally the Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutants, is a voluntary international partnership working to reduce pollutants that remain in the atmosphere for relatively short periods but exert substantial warming and public-health effects. It was launched on 16 February 2012 by the United Nations Environment Programme together with Bangladesh, Canada, Ghana, Mexico, Sweden, and the United States. The coalition is managed through a secretariat hosted by UNEP in Paris, France. The coalition concentrates on methane, black carbon, tropospheric ozone, and hydrofluorocarbons. These substances differ from carbon dioxide in atmospheric lifetime and chemistry, but each can contribute disproportionately to near-term warming or air pollution. Black carbon, a major component of soot, is produced by incomplete combustion in vehicles, engines, household stoves, fires, agriculture, and industrial activity. Methane is emitted by sources including fossil-fuel production, coal mining, livestock and other agricultural activities, wastewater, and landfills. Tropospheric ozone is formed in the lower atmosphere through reactions involving methane and other precursor pollutants. Hydrofluorocarbons are manufactured gases used in refrigeration, air conditioning, foams, solvents, and aerosols; although their atmospheric concentrations are relatively low, many have very high global-warming potentials. Rather than operating as a conventional company or fund, the CCAC functions as a policy, technical-cooperation, knowledge-sharing, and implementation platform. Its membership has included governments, intergovernmental organizations, companies, scientific institutions, and civil-society organizations. The partnership seeks to raise awareness, improve scientific understanding, help countries and regions develop mitigation plans, identify barriers to action, disseminate successful practices, and mobilize finance and technical support. Its practical work has covered heavy-duty diesel vehicles and engines, brick production, municipal solid waste, oil and natural-gas operations, agriculture, household cooking and heating, and alternatives to high-global-warming-potential HFCs. Cross-cutting work has included financing for short-lived climate-pollutant mitigation, national planning through the Supporting National Action and Planning on SLCPs program, and regional assessments intended to inform cooperation and national policy. These activities connect climate policy with air-quality management, public health, food security, waste management, energy access, and industrial modernization. The coalition presents short-lived pollutant reductions as complementary to, rather than a substitute for, deep cuts in long-lived greenhouse gases, especially carbon dioxide. Fast reductions can slow near-term warming and improve local air quality, but they cannot replace long-term decarbonization. This distinction is central to the coalition's positioning: it promotes measures that can generate immediate or relatively rapid benefits while supporting broader climate and sustainable-development strategies. The CCAC is therefore best understood as an international environmental partnership and implementation network rather than a consumer-facing brand, commercial product company, or listed organization.

The Climate and Clean Air Coalition emerged from growing recognition that climate policy and air-pollution policy could address an overlapping group of substances with unusually strong near-term effects. In contrast with carbon dioxide, which persists in the atmosphere for a very long time, short-lived climate pollutants generally remain for periods ranging from days to a few decades. Their shorter lifetimes mean that mitigation can produce comparatively rapid climate benefits, while their role in particulate pollution and atmospheric chemistry can also make interventions valuable for public health, agriculture, and ecosystems. UNEP and six countries—Bangladesh, Canada, Ghana, Mexico, Sweden, and the United States—launched the coalition on 16 February 2012. The founding arrangement created a voluntary partnership rather than a treaty-based institution. UNEP became the organizational host, with a secretariat located in Paris. The model was designed to bring together national governments and non-state participants, including intergovernmental bodies, businesses, research organizations, and civil society, around practical measures that could be implemented in specific sectors. The coalition's initial focus was on four connected pollutant groups. Black carbon is produced by incomplete combustion and is a major constituent of soot and fine particulate matter. It comes from sources such as diesel engines, ships, household stoves, fires, agricultural burning, and industrial facilities. Methane arises from both natural processes and human activities, including fossil-fuel systems, coal mines, agriculture, and landfills. It also contributes indirectly to ground-level ozone formation. Tropospheric ozone is not emitted directly; it forms through sunlight-driven reactions involving methane and other precursors such as nitrogen oxides, carbon monoxide, and volatile organic compounds. Hydrofluorocarbons are industrial gases used in cooling, foams, solvents, and aerosols. Their concentrations were relatively small compared with carbon dioxide, but their high warming potency and expanding use made them a significant prevention opportunity. During its early program development, the CCAC organized initiatives around major emitting sectors. Transport work addressed black carbon and particulate pollution from heavy-duty diesel vehicles and engines, including freight-related action. Industrial work examined emissions from brick production. Municipal-waste activities targeted methane and other pollutants from collection, treatment, disposal, and related systems. Oil-and-gas work sought to reduce methane released through venting, leakage, and flaring. Agriculture work connected methane and black-carbon mitigation with food security. Household cooking and heating activities focused on cleaner fuels, improved stoves, advocacy, and public awareness. The coalition also promoted alternatives and standards intended to limit the growth of high-impact HFCs. Cross-cutting programs were intended to help move from analysis to implementation. The financing initiative aimed to encourage greater flows from governments, donors, financial institutions, investors, and the private sector. Supporting National Action and Planning on SLCPs was designed to help countries build inventories, integrate short-lived pollutants into existing climate and air-quality frameworks, evaluate mitigation options, and prioritize practical measures. Regional assessments were intended to provide evidence for regional cooperation and national decision-making, with Latin America and the Caribbean identified as an early area of attention. The coalition's theory of change combines immediate and long-term benefits. Reducing household combustion, diesel soot, and other sources can improve air quality and reduce exposure to harmful particulate matter. Cutting methane and black carbon can also protect crops and ecosystems, while reducing methane and HFCs can slow near-term warming. At the same time, the coalition emphasizes that short-lived pollutant controls cannot replace reductions in carbon dioxide and other long-lived greenhouse gases. Sustained climate stabilization still requires deep, long-term decarbonization. As an international partnership, the CCAC has expanded its network beyond its original founders and has continued to operate through collaboration, technical assistance, assessments, guidance, and sector initiatives. Its institutional identity remains that of a UNEP-hosted coalition rather than a commercial enterprise. The organization’s principal outputs are programs, knowledge, partnerships, and implementation support, not physical products or services sold to consumers.

• 2014

  Early portfolio of sector and cross-cutting initiatives documented

  [1]Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutantsen.wikipedia.org

  The coalition reported a portfolio covering diesel transport, brick production, waste, HFC alternatives, oil and gas, agriculture, household energy, finance, national planning, and regional assessments.

• 2013

  Green Freight Call to Action

  [1]Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutantsen.wikipedia.org

  The coalition's transport work produced a Green Freight Call to Action aimed at reducing climate and health impacts from freight and heavy-duty diesel activity.

• 2012

  Coalition established

  [1]Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutantsen.wikipedia.org

  UNEP and Bangladesh, Canada, Ghana, Mexico, Sweden, and the United States launched the voluntary partnership on 16 February to address short-lived climate pollutants.

A voluntary, measures-based international coalition linking near-term climate mitigation with clean-air, health, agricultural, and sustainable-development outcomes.

• 2013Green Freight Call to Action

  Global

  An advocacy and cooperation effort under the heavy-duty diesel initiative, focused on lowering black-carbon and particulate emissions from freight transport while delivering climate and health benefits.

  Outcome. The call to action served as an early coalition framework for cooperation on cleaner freight and heavy-duty vehicle emissions.

  Source
• 2012Supporting National Action and Planning on SLCPs

  Global

  A cross-cutting program designed to help countries develop inventories, assess mitigation options, coordinate existing climate and air-quality work, and create national action plans for short-lived climate pollutants.

  Outcome. The initiative established a framework for integrating SLCP measures into national planning and development processes.

  Source
• 2012Regional Assessments of SLCPs

  Latin America and the Caribbean · Global

  A research and policy-support effort intended to produce regional evidence on short-lived climate pollutants and inform cooperation among neighboring countries.

  Outcome. Latin America and the Caribbean was identified as an initial target region for assessment work.

  Source

• 2012

  Adopted a voluntary, measures-based partnership modelStrategy

  Background

  The coalition was created to accelerate practical action on short-lived climate pollutants through cooperation among governments and non-state organizations, rather than through a new binding emissions treaty.

  Action taken

  UNEP and the six founding countries established a coalition and secretariat structure centered on awareness, national and regional action, best-practice exchange, finance, and scientific understanding.

  Aftermath

  The model enabled participation by a broad range of public, private, scientific, and civil-society actors and supported sector-specific initiatives.

  Source

• 2012

  Prioritized methane, black carbon, tropospheric ozone, and HFCsStrategy

  Background

  These pollutants have relatively short atmospheric lifetimes but can exert strong warming, air-quality, health, agricultural, or ecosystem effects.

  Action taken

  The coalition organized its technical and policy work around reducing emissions and formation of these pollutant groups across major sectors.

  Aftermath

  The focus created a common agenda linking near-term climate action with clean-air and sustainable-development objectives.

  Source

1. 1Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutantsen.wikipedia.org