Another point of comparison: the mass of Earth's atmosphere is over 5 quadrillion tons.[1] 30 billion tons is 0.0006% or 6 parts per million. These are all rea

Another point of comparison: the mass of Earth's atmosphere is over 5 quadrillion tons.[1] 30 billion tons is 0.0006% or 6 parts per million. These are all really big numbers so it's important to scale them down to something more comprehensible. 1. https://en.wikipedia.org/wiki/Atmosphere_of_Earth#Physical_properties https://en.wikipedia.org/wiki/Atmosphere_of_Earth#Physical_p...