[NTG-context] Project structure: Specifying environment in component

Hello everyone, I am creating a project of notes across different areas of mathematics I am studying and the structure looks like this: env_notes.tex project_notes.tex geogroups/groups-prd_geometry-groups.tex geogroups/groups-c_chapter1.tex I am following this wiki: https://wiki.contextgarden.net/Project_structure My question is: Why do I need to specify \environment env_notes before It works at the component level? The wiki didn’t say that. Plus it is already specified at the product level. Thanks. ~Jethro