Chlorine can combine with natural organic compounds in raw water to create some undesirable by - products; on its own, however, it does not usually pose a problem to public health. (scientificamerican.com)
Pyrethrins are natural organic compounds derived from chrysanthemums. (kcregap.org)
Bennu is a carbonaceous asteroid packed with natural organic compounds, which gives it an intriguing connection with the origin of life. (discovermagazine.com)