This document discusses moist processes in meteorology. It explains that water vapor makes up most of the water in the atmosphere and exists primarily in the troposphere. Condensation occurs when air is cooled to below its dew point, through processes like lifting, mixing with cooler air masses, or contact cooling over surfaces. Lifting air parcels cools them through expansion, with the lifting condensation level being reached when the air reaches saturation. Further lifting causes additional condensation as more water vapor condenses out of the rising air parcel. This condensation releases latent heat, slowing the cooling rate compared to unsaturated air parcels. The document also describes how downslope winds like Föhn winds can warm as they descend,