docs: link the energy and carbon page from the model list

models.md

@@ -25,6 +25,10 @@ provider today is best on both.
   policy protects you only as far as the provider keeps its word. Both are
   better than a provider with neither — and Regolo adds a written
   zero-data-retention commitment on top of its policy.
+How the co-op measures its own energy use and carbon emissions is on the
+[energy and carbon page](energy.md) — including what those figures cover and what
+they miss.
+
 - **Green energy:** *100% renewable* (GreenPT, Regolo) beats *undisclosed*
   (Tinfoil). GreenPT and Regolo both run on 100% renewable energy; Tinfoil's
   mix is not disclosed.