Sentence examples for natural source from inspiring English sources

But this is a natural source.

Radon is a natural source of radiation linked to cancer.

For CF4 a weak natural source was also included.

Plants have served as a natural source of antifertility substances.

The only natural source of wax esters is jojoba oil.

Bovine colostrum is a good natural source of immunoglobulins.

Methyl chloride, for example, is the largest natural source of atmospheric chlorine.

The innocence of children is instantly engaging, of course, their powerlessness a natural source of sympathy.

The singers, Montserrat Cortés and Chonchi Heredia, provided another natural source of drama.

Asked to further identify the natural source of his fur, Mr. Talley brushed off the question.

Even then, he said, a natural source could cause a cluster of cases.