The normal poop colour is usually light brown, and therefore it is very natural to feel uneasy if suddenly your poop becomes green in colour. (intelligentmother.com)
Indeed recent decades have seen the planet becoming greener as vegetation growth is stimulated as CO2 rises. (sciencedaily.com)
When a section is completed, the circle next to that section will become green with a little check - mark inside. (sarracannon.com)