17 of the largest ships emit more sulfur than all the cars on the planet. How is this possible?
| Actor | Role |
|---|---|
| MMichael ByersHimself | Himself |
 James HansenHimself | Himself |
| PProf. Mark JacobsonHimself | Himself |
| BBernice NotenboomBernice Notenboom (voice) | Bernice Notenboom (voice) |