Balloons are also cheaper to operate than rockets, and they require next to no infrastructure to launch and retrieve—Zero2infinity is even considering bringing the balloon and capsule to clients anywhere in the world, or at least the closest spot with suitably calm winds. Rockets are loud, while inside the balloon capsule the loudest sound will likely be conversation. And unlike emission-less balloons, rockets pollute; a recent study showed that a growing commercial space industry could have significant impacts on the global climate.