This presentation is 3 minutes and 55 seconds long Thank you to: https://all-free-download.com/free-vector/download/different-dairy-cow-design-vector-graphics_571381.html https://www.medicalnewstoday.com/articles/321866.php#why-do-we-fart https://www.thoughtco.com/chemical-composition-of-farts-608409 https://ideas.ted.com/methane-isnt-just-cow-farts-its-also-cow-burps-and-other-weird-facts-you-didnt-know-about-this-potent-greenhouse-gas/
