Short-Lived Climate Pollutant Challenge FAQs


│ What are SLCPs?

Short-lived climate pollutants, such as methane, hydrofluorocarbons (HFCs), and black carbon (commonly known as soot), are potent climate forcers and harmful air pollutants that have an outsized impact on climate change in the near-term.  Compared to CO2 and other long-lived climate pollutants, which stay in the atmosphere for centuries, short-lived climate pollutants have far more warming impact on a gram-to-gram basis, and have a lifetime ranging from days (in the case of black carbon) to decades.  Reducing emissions of these super pollutants can significantly reduce the rate of climate change in the near-term and is necessary for meeting the goals of the Paris Climate Agreement, along with significant reductions in carbon dioxide emissions. 

│ What is the US Climate Alliance doing to avoid and reduce SLCPs?

On June 1, 2018, the U.S. Climate Alliance committed to reducing short-lived climate pollutants as a critical component to meeting the goals of the Paris Agreement. The Alliance is working to comprehensively address short-lived climate pollutants through new and continued actions to improve emissions inventories; quickly identify and fix methane leaks and “super emitters;” promote energy efficiency; phase-down the use of HFCs; improve the management of organic and agricultural waste streams; and define other targets and measures to rapidly reduce emissions of these potent pollutants.

Immediate action on these pollutants is necessary to limit the global temperature increase to well below 2°C, and to pursue efforts to limit the increase to 1.5°C.

But the Alliance cannot do this alone. We invite all national and subnational jurisdictions, businesses, and other actors to join the SLCP Challenge and bring commitments to reduce short-lived climate pollutants to the Global Climate Action Summit in San Francisco, California this September.


│ What does it mean to accept the SLCP Challenge?

For those who are making substantial contributions towards the reduction of SLCPs, we invite you to share your leadership and expertise at the Global Climate Action Summit and milestones beyond, and to encourage others to commit to act.  We urge you to bring your commitments to reduce emissions of methane, HFCs, and black carbon to the Global Climate Action Summit, and to share these pledges through the We Are Still In contribution campaign platform. Additionally, we suggest using the hashtag #SLCPChallengeAccepted in any social media posts about your efforts. We encourage those that accept the Challenge to work with the U.S. Climate Alliance, Climate and Clean Air Coalition, and other groups to share best practices and to accelerate the implementation of SLCP-reducing activities.  The U.S. Climate Alliance will also display your logo on our website to recognize your leadership on SLCPs.


│ Who else is taking action on SLCPs?

There is widespread support for reducing emissions of short-lived climate pollutants among businesses, governments, and other organizations.  This includes commitments from major oil, gas, and chemical companies and their coalitions, the Climate and Clean Air Coalition to Reduce Short-Lived Climate Pollutants, the Under2 Coalition, the Global Methane Initiative, the entire international community under the Kigali Amendment to the Montreal Protocol, and many more.  The Climate Alliance will work with these and other interested organizations to expand action and develop tools and strategies to reduce emissions of these potent pollutants.


│ I’m in! Where can I register my pledge?

You can submit your pledge through the We Are Still In Contributions Campaign Platform.


│ Will there be any reporting or tracking procedures?

The Alliance states report publicly on an annual basis on their implementation.  We encourage those that accept the Challenge to do the same. That said, you are not asked to report back through the U.S. Climate Alliance.