It called evaporation it rises and turn to fresh water.It fresh water any water that not in salt water is fresh water.At least i think that the answer.
Atmospheric gasses that absorb infrared radiation
It is currently 79.50%. Last month it was 79.80% which was the highest it has ever been. The lowest it has been is 74.10%.
The years I have collected this data from is 1971-2020 and the total labor force does change monthly.