This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Nitrogen cycle el. Nitrogen cycle diagram own transferred from org el transferred to Commons by User MARKELLOS using de php CommonsHelper Rickproser PDAUTHOR Rickproser original upload log page el CE CF CE BA CE BB CE BF CF Rickproser bytes no Rickproser bytes no Rickproser bytes no Rickproser
Page 2023 Free-images.com. All images are Public Domain