Global food demand,productivity growth,and the scarcity of land and water resources: a spatially explicit mathematical programming approach

In the coming decades, an increasing competition for global land and water resources can be expected, due to rising demand for food and bio‐energy production, biodiversity conservation, and changing production conditions due to climate change. The potential of technological change in agriculture to adapt to these trends is subject to considerable uncertainty. In order to simulate these combined effects in a spatially explicit way, we present a model of agricultural production and its impact on the environment (MAgPIE). MAgPIE is a mathematical programming model covering the most important agricultural crop and livestock production types in 10 economic regions worldwide at a spatial resolution of three by three degrees, i.e., approximately 300 by 300 km at the equator. It takes regional economic conditions as well as spatially explicit data on potential crop yields and land and water constraints into account and derives specific land‐use patterns for each grid cell. Shadow prices for binding constraints can be used to valuate resources for which in many places no markets exist, especially irrigation water. In this article, we describe the model structure and validation. We apply the model to possible future scenarios up to 2055 and derive required rates of technological change (i.e., yield increase) in agricultural production in order to meet future food demand.     

11. Toward Lasting Peace: Kant on Law, Public Reason, and Culture

Kant helps us understand the conditions for peace by reminding us that lasting peace requires both cosmopolitan legal reform and individual moral improvement, including resistance to egoism and the cultivation of cosmopolitan attitudes. The duty to pursue peace includes the duty to promote the rule of domestic and international law and work against its unilateral subversion. The juridical cosmopolitanism of a worldwide league of free peoples enables resistance to the dangers posed by authoritarian regimes and their dangerous willingness to manipulate their subjects and ignore international law. Constraining egoism enables people to overcome the tyranny of their desires and cultivates a sense of affiliation with the larger community of humanity in general, providing the moral foundation needed to support a cosmopolitan legal order. Moral development to a great extent is fostered through the arts and humanities, and a robust cultural life therefore ought to play a central role in the pursuit of global peace.     

6 Does Kant Have Anything to Teach Us about Environmental Ethics?

A bstract .   Immanuel Kant's thought typically is represented as hostile to environmental concerns, but his aesthetics offers significant resources for environmental ethics. His account of the disinterestedness of taste raises the possibility of a manner of motivating a noninstrumental and responsive—rather than self-interested and consumerist—attitude toward nature. The aesthetic consciousness thus can help situate us within rather than pit us against the natural world. Kant's thinking about the beautiful and the sublime point to an ambiguous conception of subjectivity, a picture of the subject who experiences itself both as immersed within a meaningful world and as raised above a world to which it is morally superior. Such a conception may orient investigations in environmental philosophy by providing a more realistic view of the relationship between human beings and nature than do either dualistic or monistic theories.