Watch the full episode here: youtu.be/84xlZYBb8Zw It can instantly cause severe burns on your skin. It can even dissolve things like limestone and concrete. This is battery acid. Now instead of this acid being inside our batteries, what if we decided to fill 80% of our world with it? Specifically, what if we decided to turn our oceans into acid? What would this acid do to ocean wildlife? What would swimming in this be like? And how could this affect our cities? Questions or concerns? Contact us at underknown.com/contact Interested in sponsoring our episodes or collaborating? Email us: inquiries@underknown.com Get our 100 best episodes in one mind-blowing book: bit.ly/ytc-the-what-if-100-book Join this channel to get access to perks: youtube.com/channel/UCphTF9wHwhCt-BzIq-s4V-g/join Get a Cameo by Peter: cameo.com/whatifguy Check out our other channels: How to Survive: bit.ly/how-to-survive-show Aperture: bit.ly/apert...