Lake Baikal is the largest freshwater ecosystem in the world, containing 20% of the world's unfrozen freshwater.

Deserts are not wetlands, as they are characterized by a lack of water.

Evaporation is the process by which water moves from the Earth's surface to the atmosphere.

Cacti are not aquatic plants, as they are adapted to living in dry environments.

Infiltration is the process by which water seeps into the ground.

Deforestation is not a type of water pollution, although it can contribute to water pollution by increasing erosion and runoff.

Precipitation is the process by which water moves from the atmosphere to the Earth's surface.

Salamanders are not aquatic animals, although they can live in moist environments.

Transpiration is the process by which plants release water vapor into the atmosphere.

Using a car wash that recycles water is not a type of water conservation measure, as it does not reduce water use.

Percolation is the process by which water moves through the ground.

Deserts are not water-related ecosystems, as they are characterized by a lack of water.

Erosion is the process by which water erodes soil.

Natural sources are not a type of water pollution source, as they do not introduce harmful substances into water.

Runoff is the process by which water flows over the Earth's surface.