A new global roadmap aims to cut “superpollutants” — fast-acting greenhouse gases that cause about half of current warming.

The Superpollutant Roadmap was launched at Climate Week NYC by the Beyond Alliance and the Carbon Containment Lab. It targets methane, black carbon, nitrous oxide and HFCs.

Cutting methane alone could avoid 0.2 degrees of warming by 2050, according to scientists. Methane is over 80 times more potent than carbon dioxide in the short term.

Amazon, Google, JPMorgan, Salesforce and Workday pledged $100 million to fund the effort. Campaigners say cutting superpollutants is the fastest way to slow warming this decade, alongside longer-term cuts to carbon dioxide.

Methane comes largely from oil and gas, farming and landfills. Cutting it is seen as a quick win because it breaks down faster than carbon dioxide. The roadmap lays out steps for governments and companies to act this decade. Supporters hope it becomes a model for faster climate action alongside CO2 cuts.