Leaks water? The condensation drain is plugged.
Check your cabin air filter.
as the air inside the car cannot escape from a closed atmosphere the cool air inside the car is condensed in the form of water vapour in the spectacles.
I had this happend to my 2006 GS 300. The problem was an air condition seal between the firewall and the inside of the car was worn, causing the condensation that leaks from the AC to drain inside the vehicle. It was a simple fix, but they had to replace the whole carpet. Thank god for warranty.
I have never heard of anyone contracting any health issues with this problem as the water that you are seeing is just condensation from the air conditioner.
With many vehicles, if the defrost mode is on, the ac will continue to run. This helps to clear the inside windshield from moisture.
i believe your heater core has died
It is a small hose behind the motor, under the car. sometime is stoped with dirt and the water coming inside de car at the passenger side.
The reason you see water when you run the a/c system is because the evaporator is removing the moisture in the air from inside the vehicle. you see it is hard to cool moist air. The apposite is true in your home that is you can't heat dry air.
yes
changes the air temperature inside
The air on the inside of the car is warmer than the air outside.
If your car smells like the inside of a smelly gym shoe, you might need an air ionizer. Not only will it remove the offending smells, but it also works to clean and purify the air inside your car.