increasing of fresh water consumption and consecutively drought periods caused reduction of renewable freshwater resources in recent years. one of the basic strategies to conquer this problem is using non-conventional water resources particularly reuse of polluted water. in this study, activated carbon derived from walnut shell was used as tertiary treatment. activated carbon powder was used in...

We model long-run electricity supply and demand for the western United States. We evaluate the costs of carbon-reducing and water-conserving scenarios. Carbon-reducing scenarios become cost-effective at carbon prices of $50–70 per ton CO2. Water-conserving scenarios are only cost-effective above $4000/acre-foot of water. Electricity planning is central to climate policy, but much less so to wat...

Reducing greenhouse gas emissions not only lowers expected damages from climate change but also reduces the risk of catastrophic impacts. However, estimates of the social cost of carbon, which measures the marginal value of carbon dioxide abatement, often do not capture this risk reduction benefit. Risk-averse individuals are willing to pay a risk premium, an additional amount beyond the differ...

Given the agreed urgency of decarbonizing electricity and the need to guide decentralized private decisions, an adequate and credible carbon price appears essential. The paper defines and quantifies the useful concept of the break-even carbon price for mature zero-carbon electricity investments. It appears an attractive alternative given the difficulty of measuring the social cost of carbon, bu...

With the development of deregulated power systems and increase of prices in some hours of day and increase fuel price, demand response programs were noticed more by customers. demand response consists of a series of activities that governments or utilities design to change the amount or time of electric energy consumption, to achieve better social welfare or some times for maximizing the benefi...

the serious obstacles to improve water supply, has caused world debates, seeking some solutions to tackle the problem of shortages in water supply. t. therefore, programs and policies have focused mainly on appropriate pricing approachof. since the water industry in iran has been monopolized by the government, an effective pricing approach is assumed to maximize the social welfare with consider...

The UK Government recently reviewed its methodology to value greenhouse gas emissions in policy appraisal. The Review implemented a move away from the previous approach, which used estimates of marginal social damage costs (‘the social cost of carbon’) to value changes in emissions, to one in which valuation is based on the marginal abatement costs that will need to be incurred to meet specific...

Encouraging agricultural and forestry carbon sequestration and greenhouse gas mitigation is a necessary tool to meet U.S. emissions targets at minimum cost, but implementation challenges have relegated the agriculture and forestry sector to a marginal role in national and international cap-and-trade and energy policies, including those currently being discussed by U.S. legislators. However, the...

PURPOSE Total knee arthroplasty (TKA) is an effective, but also cost-intensive health care procedure for the elderly. Furthermore, bearing demographic changes in Western Europe in mind, TKA-associated financial investment for health care insurers will increase notably and thereby catalyze discussions on ressource allocation to Orthopedic surgery. To derive a quantitative rationale for such disc...

Using the economics of gas exchange, early studies derived an expression of stomatal conductance (g) assuming that water cost per unit carbon is constant as the daily loss of water in transpiration (f(e)) is minimized for a given gain in photosynthesis (f(c)). Other studies reached identical results, yet assumed different forms for the underlying functions and defined the daily cost parameter a...