There are many natural reserves in this country.

There are many natural preserves in this area.

Natural transformations are important in category theory.

Natural joins are used to combine tables based on matching column names.

Many women prefer natural births over medical interventions.

Cotton and silk are examples of natural fibers.

I prefer to eat natural foods.

Natural convections occur in various systems.

Natural isomorphisms are important in category theory.

Natural grammars are important for understanding language structure.