The process is called transpiration
CHECK:Plants lose<span> gallons of </span>water<span> every day </span>through<span> the </span>process<span> of transpiration, the evaporation of </span>water<span> from </span>plants<span> primarily </span>through<span> pores in </span>their leaves<span>. </span>
The Cell membrane is the answer.
They change the air from water vapor (gas) to liquid water. This can produce clouds you see in the sky or dew or fogs.