mik-laj commented on a change in pull request #10970:
URL: https://github.com/apache/airflow/pull/10970#discussion_r493089639



##########
File path: docs/cli-ref.rst
##########
@@ -35,3 +35,46 @@ development and testing.
    :module: airflow.cli.cli_parser
    :func: get_parser
    :prog: airflow
+
+Environment Variables
+'''''''''''''''''''''
+
+.. envvar:: AIRFLOW__{SECTION}__{KEY}
+
+  Any specific key in a section in Airflow.
+  The user may replace the ``{SECTION}`` placeholder with any section
+  and the ``{KEY}`` placeholder with any key in that specified section.
+  For example, the user may initiate "AIRFLOW__CORE__DAGS_FOLDER",
+  where CORE is the section and DAGS_FOLDER is the key within the section.

Review comment:
       I hope you do not offend my comments, but I do try to make the 
documentation accessible to a wide audience.
   I believe that every developer should read Google's guide, which highlights 
some good practices.
   https://developers.google.com/style




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