Explain how scientists know the oxygen level in the atmosphere has changed because of plants. Could our atmosphere still be changing?

Because Plants convert Carbon DIoxide into fresh air, so the more plants/trees, the more clean air we have to breathe. And yes our atmosphere is constantly changing.

Explanation:

Hope this helps

- "the acute form of diverticulitis can manifest itself with one or more severe attacks of infection and inflammation.

the inflammation of diverticulitis can eventually result in a bowel obstruction, which may cause constipation, thin stools, diarrhea, abdominal swelling or bloating, and abdominal pain."