ESS, in partnership with Citizens for Responsible Energy Solutions and the U.S. Energy Association released an issue brief detailing the critical need for long-duration energy storage (LDES) to create an efficient, low-carbon energy system and avoid the curtailment of renewable energy resources. The brief which analyzes curtailment data from grid operators nationwide, illustrating the mismatch between renewable energy supply and grid demand and demonstrating the need for long-duration energy storage to decarbonize the energy system.