The scarcity of suitable organ donors leads to protracted waiting times and mortality in patients awaiting lung transplantation. This study aims to assess the short- and long-term effects of a high emergency organ allocation policy on the outcome of lung transplantation. We developed a simulation model of lung transplantation waiting queues under two allocation strategies, based either on waiti...

This paper employs an economic-engineering optimization model to explore water supply options for environmental restoration of the Colorado River Delta, Mexico. Potential water sources include reductions in local agricultural and urban water use through water markets, wastewater reuse, and additional Colorado River flows from the United States. For these alternatives, the optimization model est...

The link between water scarcity and public unrest is a close one. Groundwater is the only viable resource in most arid and semi-arid environments that can sustain rural and urban populations. Periodic drought forces people off the land who take refuge in the cities, taxing already stressed resources. Mining of groundwater places cities at risk; aquifers supplying both Yemen’s capital city Sana’...

water scarcity in iran has worsened as a result of population growth, increasing pollution, poor water management practices, and climate change. using proper utilization and management of wastewater can provide the ability to cope with pollution threats and take the opportunity to benefit from the new sources of water. in this study, the impact of water scarcity on the production and macroecono...

Corn production, and its associated inputs, is a relatively large source of greenhouse gas emissions and uses significant amounts of water and land, thus contributing to climate change, fossil fuel depletion, local air pollutants, and local water scarcity. As large consumers of this corn, corporations in the ethanol and animal protein industries are increasingly assessing and reporting sustaina...

Adopting a policy and deciding on long-term investment in the mining industry by a government orprivate sector actors depends strongly on the ability to predict the scarcity of mineral reserves. Changein scarcity of mineral reserves is a function of several technological and non-technological factors.Among them, change in technology is the most significant factor affecting scarcity. This paper ...

Reservoirs are built worldwide for a higher water supply in dry periods by storing temporarily wet periods. Recent socio-hydrology studies hypothesized, creating “supply–demand cycles”, that reservoirs can lead indirectly to counterintuitive dynamics such as more scarcity and economic social vulnerability. This opinion argues part of co-evolutionary processes with natural, social, engineered el...