Freshwater constitutes only a small fraction of the Earth's total water resources, with approximately 2.5% of the Earth's surface covered by freshwater.

Freshwater pollution can be caused by various sources, including industrial wastewater, agricultural runoff, domestic sewage, and other human activities.

Water filtration, water purification, and water treatment are all processes that involve removing pollutants and impurities from water to make it safe for drinking or other uses.

Reforestation, wetland restoration, and riparian buffer restoration are all effective methods for restoring degraded freshwater ecosystems and improving their ecological functions.

Water conservation, water efficiency, and water management all refer to the practices and strategies employed to reduce water consumption and promote sustainable water use.

Freshwater biodiversity is threatened by various factors, including habitat loss, pollution, climate change, and the introduction of invasive species.

Dam release, reservoir release, and water discharge all refer to the process of releasing water from a dam or reservoir, often for purposes such as flood control, irrigation, or hydropower generation.

Water sampling, water testing, and water analysis are all methods used to assess the quality of water and determine its suitability for various uses.

Wetland restoration, wetland rehabilitation, and wetland mitigation all refer to the process of restoring a degraded wetland to its natural or former condition.

Riparian buffer strips, vegetated filter strips, and streambank stabilization are all effective methods for preventing soil erosion in riparian areas and protecting water quality.

Nutrient removal, nutrient management, and nutrient control all refer to the processes and strategies employed to reduce excess nutrients in water bodies and prevent eutrophication.

Freshwater salinization can be caused by various factors, including agricultural irrigation, industrial wastewater discharge, mining activities, and natural processes such as saltwater intrusion.

Water resource management, integrated water management, and water conservation all refer to the practices and strategies employed to manage water resources in a sustainable and equitable manner.

Freshwater conservation faces numerous challenges, including climate change, population growth, economic development, and the increasing demand for water resources.

River restoration, stream restoration, and riparian restoration all refer to the process of restoring a degraded river or stream to its natural or former condition.