A bipartisan group of senators is aiming to give the EPA a pathway to implement a global deal limiting potent greenhouse gas refrigerants. The move could help tip the scales as the Trump administration weighs whether to support the deal.

Republican Sen. John Kennedy (La.) and Democratic Sen. Tom Carper (Del.) introduced legislation Feb. 15 that would direct the Environmental Protection Agency to establish a market-based system to meet the global requirements to limit hydrofluorocarbons (HFCs), potent greenhouse gas chemicals commonly used as refrigerants.

Joining Kennedy and Carper on the legislation are Republican Sens. Bill Cassidy (La.)...