Starting with the NETL CO2U database, I've defined a system using a process from NREL for purified terephthalic acid, PTA (National_Renewable_Energy_Laboratory/USLCI_Public_2023_Q1_v1). Looks to be well defined back thru paraxylene and petroleum feeds. Executed with TRACI 2.1 (NETL) impact assessment but GWP coming back zero. Is there a provider link perhaps I'm not initializing correctly or other advice to troubleshoot? Many thanks