The world is on the brink of the greatest crisis it has ever faced: a spiraling lack of fresh water. Groundwater is drying up as water demands for food production, for energy, and for manufacturing are surging. Water is emerging as a headline geopolitical issue and worsening water security will soon have dire consequences in many parts of the global economic system. Directed by UN Secretary General Ban Ki-Moon at the 2008 Davos Annual Meeting, the World Economic Forum assembled the world's foremost group of public, private, non-governmental organization and academic experts to examine the water crisis issue from all perspectives. The result of their work is this stark, non-technical overview of where we will be by 2025 if we take a business-as-usual approach to (mis)managing our water resources. Equally stunning are the potential solutions and the recommendations that the group presents. All are included in this landmark publication. Water Security contains compelling commentary from leading decision-makers, past and present. The commentary is supported by analysis from leading academics of how the world economy will be affected if world leaders cannot agree on solutions. The book suggests how business and politics need to manage energy-food-water-climate nexus as leaders negotiate details of the climate regime that replace Kyoto Protocols.

Arsenic is a toxic metalloid of global concern. It usually originates geogenically but can be intensified by human activities such as applications of pesticides and wood preservatives, mining and smelting operations, and coal combustion. Arsenic-contaminated food is a widespread problem worldwide. Data derived from population-based studies, clinical case series, and case reports relating to ingestion of inorganic arsenic in drinking water, medications, or contaminated food or beverages show the capacity of arsenate and arsenite to adversely affect multiple organ systems. Chronic arsenic poisoning can cause serious health effects including cancers, melanosis (hyperpigmentation or dark spots, and hypopigmentation or white spots), hyperkeratosis (hardened skin), restrictive lung disease, peripheral vascular disease (blackfoot disease), gangrene, diabetes mellitus, hypertension, and ischemic heart disease.

Water is a major input in food, from primary production through all stages in the food value chain to consumption. The safest option in food production might be the use of water only of potable or drinking water quality; however, this is often not a feasible, practical or responsible solution and water of different quality could be fit for some purposes, provided it does not compromise the safety of the final product for the consumer. When used alone, numbers of E. coli present in water are not an appropriate measure of water safety. Instead, an assessment of the fitness-for-purpose and the microbiological criteria of water required to maintain product safety should be risk-based. Decision trees and matrices were developed to assist stakeholders in making decisions on the water’s fitness in fresh produce productions, fishery products and water reuse scenarios. Communication tools, including education and training and programmes to encourage behaviour change, are essential for effective risk management of water use in food chains.

In an overall evaluation of the situation published by IARC in 1993, beryllium and beryllium compounds are identified as carcinogens to humans. This prompted the initiation of this study on beryllium which reviews the situation up to 1998 on the aspects: properties and applications, toxicity, analytical procedures for food and drinking water, reference materials, occurrence in food and drinking water and estimates of daily dietary exposure. Special emphasis is put on analytical aspects and levels of beryllium in food and drinking water.

The water-energy-food (WEF) Nexus encompasses complex and interdependent relations and its examination requires content-specific concepts and approaches. Managing, conserving and maximizing the potential of each component is a major global concern considering the many challenges to be faced in the 21st century. The aim of this study was to identify, in the literature, recommendations for public policy, research and development, and practices for the WEF Nexus, aimed at promoting sustainable development considering stochastic and risk elements. In this regard, this paper presents a literature review of the contribution scientific studies have made toward better understanding the importance of the WEF Nexus in the context of sustainable development. Research indicates that the WEF Nexus cannot be discussed as independent sectors, highlighting the need for integrated policies and inter-sectoral and international cooperation to promote sustainable development. Therefore, the effective management of the WEF Nexus requires science-based data using risk and stochastic elements to assist policy and decision-making. Thus, in a situation of rapid global changes, decision-making processes for this Nexus must be assisted by multidisciplinary, multi-stakeholder and cross-sectoral approaches, aimed at avoiding the unintended effects of a single sector approach (e.g., energy policies stimulating hydroelectricity production need to consider factors affecting conservation and food production). With regard to the effects of climate change on the WEF Nexus, risk and stochastic elements must be considered when developing a science-based model for the sustainable management of WEF resources.

With the economic and social development and population growth, as three basic interconnected resources, water, energy and food are gradually deficient and inharmonious. This research selected 31 provinces of China as the study area and collected data of 16 years’ time series. The temporal and spatial synergetic change of water, energy and food was quantitatively described by wavelet analysis and MK test methods. The results show that water consumption for energy in 2001–2016 has the first main period of 12 years and the temporal synergetic change of water and energy would not be obvious in the future. According to the results, the resources consumption of water energy and food can be optimized to implement the sustainable utilization. Also, this paper proposed the adjustment strategy for the country.

The integrative approach of water, energy, and food nexus (WEF nexus) is now widely accepted to offer better planning, development, and operation of these resources. This study presents a first attempt towards understanding the WEF nexus of urban environments in the Nile River Basin under conditions of hydrological droughts and fluvial floods. A case study was conducted for the capital of Sudan, Khartoum, at the confluence of the White Nile and the Blue Nile for illustration. The results were based on analyses of river flow and water turbidity data, field observations, a printed questionnaire and an interview of farmers practicing irrigated agriculture, and hydropower modeling. The study analyzes indicators for the association of the river water resources environment (intra-annual regime, quantity, and quality), the status of urban irrigated agriculture, water treatment for domestic use, and hydropower generation under hydrological extremes, i.e. droughts and fluvial floods. It additionally examines the consequent interactions between the impacts on three sectors. The present study shows how floods and droughts impose impacts on seasonal river water quality and quantity, water treatment for domestic use, irrigated agriculture, and hydro-energy supply in an urban environment. The results demonstrate how the two hydrological phenomena determine the state of hydropower generation from dams, i.e. high energy production during floods and vice versa during droughts. Hydropower dams, in turn, could induce cons in the form of low fertile soils in the downstream due to sediment retention by the reservoir. Finally, present and potential options to minimize the above risks are discussed. This study is hoped to offer good support for integrated decision making to increase the resource use efficiency over the urban environment within the Nile Basin.

Microcystins (MCs) are hepatotoxins, produced by various species of cyanobacteria, whose occurrence is increasing worldwide owing to climate change and anthropogenic activities. More than 100 variants have been reported, and among them MC-LR is the most extensively studied, but there are other MC congeners that deserve to be investigated. The need for data to characterize the toxicological profile of MC variants other than MC-LR has been identified in order to improve risk assessment in humans and wildlife. Accordingly, the aim of this study was to evaluate the information available in the scientific literature dealing with MC-RR, as this congener is the second most common cyanotoxin in the environment. The review focuses on aspects such as occurrence in water and food, and toxicity studies both in vitro and in vivo. It reveals that, although MC-RR is a real hazard with a high exposure potential in some countries, little is known yet about its specific toxicological properties that differ from those of MC-LR, and important aspects such as genotoxicity and chronic effects have not yet been sufficiently addressed.

Water, energy and food are the basic resources for human survival and development. The coordination development of water-energy-food (W-E-F) is of great significance to promote regional sustainable development. In this study, Northwest China (Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang) was selected as the research case, and an evaluation index system was constructed to assess the vulnerability and coordination of water-energy-food (W-E-F) system based on PSR model. Then, a coupled model based on cloud-matter element model and coordination degree model was proposed. The cloud-matter element model was adopted to evaluate the vulnerability level of W-E-F system. The coordination degree model was employed to calculate the coordination degrees of W-E-F system. The results showed that, from 2006 to 2015, the vulnerability levels of W-E-F system in Northwest China were mostly at Level 1. The coordination degrees of W-E-F system belonged to the transitional development level (II) in most years. The vulnerability and coordination problems of W-E-F system in Northwest China were severe. The comprehensive vulnerability index values of W-E-F system were generally on the rise, but far from reaching a good level. Moreover, the comprehensive vulnerability index values and coordination degrees of W-E-F system in Northwest China do not match well. Finally, the countermeasures and suggestions to improve the coordinated development of water resource, energy and food in Northwest China were put forward.