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.
Biostation. fr Biostation du rseau de bioindication de l'ozone par le tabac dans le NordPas de Calais APPA APPA NPC Tobacco farming Air quality monitoring Ozone
Page 2023 Free-images.com. All images are Public Domain