Pollutants that are short-lived in the atmosphere, such as black carbon, methane and hydrofluorocarbons (HFCs), are responsible for a substantial fraction of current global warming, with particularly large impacts in urban areas and sensitive regions of the world such as the Arctic, and have harmful health and environmental impacts.
Addressing these short-lived climate pollutants can have immediate, multiple benefits. Reducing them will protect human health and the environment now and slow the rate of climate change within the first half of this century.
Recognizing that mitigation of the impacts of short-lived climate pollutants is critical in the near term for addressing climate change and that there are many cost-effective options available, the governments of Bangladesh, Canada, Ghana, Mexico, Sweden and the United States, along with the United Nations Environment Programme (UNEP), came together to initiate the first effort to treat these pollutants as a collective challenge. Together, they formed the Climate and Clean Air Coalition to Reduce Short Lived Climate Pollutants (CCAC), a unique initiative to support fast action and make a difference on several fronts at once: public health, food and energy security and climate.