Humans and plants live in a symbiotic relationship, where humans breathe oxygen and plants produce it as a byproduct of photosynthesis. At the same time, humans produce carbon dioxide as byproduct of breathing and plants use carbon dioxide in photosynthesis.
All plant life produces oxygen as part of photosynthesis.
image by "Shelter" is Copyrighted by Flickr user: Richard0 (RICHARD OUTRAM) under the Creative Commons Attribution license.
An estimated 230,000 plant species exist on earth. Of these, 23,000 are trees. The remaining 207,000 plant species include flowers, scrubs and grasses.
About this Author
Armed with a Bachelor of Arts in English from East Stroudsburg University, Amy Gouger quit her job as a technical agent in 2009 to embark on her dream of writing full-time. She's served as a ghostwriter and contributed to a number of online outlets including USAToday.com.