Other emissions come from human activities (the ... wrote French researcher Philippe Ciais in 2021. - Fluorinated gases - Fluorinated greenhouse gases (PFCs, HFCs and SF6) are found in fridges ...

Other gases, including methane, make up the remainder. The atmospheric concentration of water vapour is less than 1% and, with CO2 making up only a few molecules in every ten thousand of air ...

They move freely over each other, a bit like marbles in a bucket.This is why liquids can be poured. In a gas, like helium, particles are widely spaced apart and move quickly and random directions.