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Universal basic income (UBI) is a social welfare proposal in which all citizens receive a minimum income without a means test or need to work. Learn about the history, arguments, and examples of UBI from antiquity to the present.
Water conservation is the sustainable management of fresh water to meet current and future human demand and protect the hydrosphere. It involves various policies, strategies and activities to reduce water loss, use and waste, avoid water quality damage, and improve water management practices.
Ecosystem services are the benefits that humans derive from healthy ecosystems, such as food, water, air, climate regulation, and biodiversity. Learn how ecosystem services are grouped into four categories (provisioning, regulating, supporting, and cultural) and how they are evaluated and valued.
Water supply is the provision of water by various means to meet human and other needs. It involves water sources, treatment, distribution, storage, and sewer systems, as well as service quality issues such as continuity, water quality, and pressure.
Water security is the reliable availability of water for health, livelihoods and production, with acceptable risks of too much or too little water. Learn about the different aspects, factors and threats of water security, and how it relates to WASH and IWRM.
Learn about the economy of the United States, the world's largest and most powerful nation by GDP, trade, and military. Find statistics, trends, sectors, and challenges of the US economy, as well as its history and outlook.
Learn about the supply, demand, and allocation of the Earth's natural resources, and how to develop more sustainable methods of managing them. Explore the topics, models, and theories of natural resource economics, such as Hotelling's rule, Hartwick's rule, and the concept of perpetual resources.
Learn about different ways of storing water for consumption and agriculture, such as groundwater, soil moisture, wetlands, ponds, tanks, dams and reservoirs. Find out the benefits and challenges of water storage, such as contamination, evaporation, flood control and food security.