Question

Oxygen and Carbon dioxide trace gas​

Answer 1

Answer:

Carbon dioxide, methane, nitrous oxide and most other long-lived greenhouse gases (i.e., barring short-lived water vapour), are considered 'trace gases' because their concentration in the atmosphere is so low. For instance, at a current level of 389 parts per million, CO2 represents just 0.0389% of the air, by volume.

Answer 2

Answer:

Carbon dioxide, methane, nitrous oxide are most other long–lived greenhouse gases ( i.e barring short–lived water vapour ) are considered "trace gases" because their concentration in atmosphere is so low. For instance, at a current level of 389 per million, CO2 represents just 0.0389% of the air, by volume.