/u/KevlarGorilla's posts in /r/askscience
If our air is usually 78% nitrogen and 21% oxygen, where is all the carbon dioxide for plants to work from?
1 upvotes
Mark as read: Add to a list
Many mouthwashes claim to kill 99.9% of bacteria in your mouth. How effective is it against viruses?
1 upvotes
Mark as read: Add to a list
1 upvotes
Mark as read: Add to a list
