The approach used to create inventories was the same as that used for the Heavy-Duty Engine (HDE) Rulemaking analysis (US EPA, 2000d) with modifications to reflect emission and modeling advances since that analysis.
Using the same process as previously saved time and effort.
mnli hypothesis: Using the same process as previously saved time and effort. premise: The approach used to create inventories was the same as that used for the Heavy-Duty Engine (HDE) Rulemaking analysis (US EPA, 2000d) with modifications to reflect emission and modeling advances since that analysis.