The Bible says that before the flood there was no rain and a dew watered the soil. It is possible?
For there to be rain you need a balance between pressure and temperature. If we increase the pressure the more difficult it will be to form steam, if we decrease the pressure the easier it will be the formation of steam. If we increase the higher temperature the formation of steam, if we reduce the lower temperature it is the formation of steam. Thus balancing pressure and temperatures have the formation of clouds. There are physical calculations that can determine the value of condensation or dew, if we use the temperature with 30 degrees Celsius, if the planet earth had 1.2 atmospheres, it would be enough to generate the environment exposed in the bible. To increase this pressure, there is only a higher concentration of a gas lighter than water. Like Helio, for example.
https://www.youtube.com/watch?v=5k1K0VzzZ0A
