870
Comparisons were performed in different utilizations , both temporal and spatial , to determine if high utilization reduces the environmental impact of AM more than other interventions , such as using sustainable print materials .
 impact, AM, as, sustainable, print, materials
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 impact, AM, as, sustainable, print, materials