diff --git a/main.py b/main.py
index 370e050..98b0f20 100644
--- a/main.py
+++ b/main.py
@@ -9,6 +9,7 @@
 from dotenv import load_dotenv
 from urllib.parse import urlencode
 
+# load the .env file, which stores the API key value
 load_dotenv()
 
 # Replace this value with your own API key from openweathermap.com.