Olympian runs in a bubble FULL of hydrogen car EMISSIONS

Hyundai has quite the marketing video for its Nexo: a hydrogen fuel cell-powered SUV that emits just water and oxygen, getting an Olympian to run inside of a bubble in its emissions.

It's hard to convey just how clean a hydrogen fuel cell-powered SUV is, so getting a super-fit Olympian (in this case, Olympic swimmer and brand ambassador Mireia Belmonte) to run on a treadmill inside of a bubble that is sucking in the emissions from Hyundai's Nexo is a neat-o idea.

Hyundai makes it clear that the vehicle only emits water and 99.9% filtrered oxygen, with the South Korean car giant teaming with the Spanish National Centre on Hydrogen and a sports medical center to make sure the entire test was safe -- and in the end, we get an awesome display at how efficient and green the Nexo hydrogen fuel cell-powered SUV is.