Local communities rely on natural reserves to support biodiversity and sustainable tourism.

Many anthropologists study how a natural economy operates in remote communities where people exchange goods and services without using money.

Researchers studied how natural economies respond to climate change and resource depletion.

In his will, he left more to his natural children than to his stepchildren.

Linguists often study natural vowels to understand how vowel systems evolve in different languages.

In calculus class, we spent the afternoon graphing natural logs to compare their asymptotes.

In everyday speech, the natural vowel often replaces clearer vowels in unstressed syllables.

When he learned he was a natural child, he struggled with whether to seek recognition from his father.

The immunologist highlighted how a natural killer cell identifies and destroys infected cells within minutes.

He insisted that the wedding menu feature only natural food to ensure nothing had been chemically altered or artificially added.