In my opinion, LHP and RHP cannot be defined abstractly, in terms of just one aspect of the principles or aims of a particular path. Instead, I regard LHP and RHP as groupings that have evolved spontaneously, and whose meaning is mainly social and historical.
The cold plate causes the moisture in the warm air, which is inside the jar to condense and form water droplets. This is the same thing that happens in the atmosphere. Warm, moist air rises and meets colder air high in the atmosphere. The water vapor condenses and forms precipitation that falls to the ground.
The smell of rain comes from pollutants and particulate matter that dissolves in rain drops on their way to the ground in what meteorologists call wet Deposition (aerosol physics). Other wise rain is always pure water without any smell , its naturally purified water.