Search Results for: environment

The construction, maintenance, and operation of transportation infrastructures are subject to five major types of constraints.

Author: Dr. Jean-Paul Rodrigue Transportation seeks to minimize the effort of moving passengers and freight between locations. A component of this effort involves route selection. 1. Route Selection Human beings are natural effort minimizers, notably when it involves moving around. When given the opportunity, they will always try to choose

Authors: Dr. Jean-Paul Rodrigue and Dr. Claude Comtois Performance indicators are widely used to empirically assess the technical performance of different transport modes, namely their capacity to move passengers or freight around. 1. Network and Operational Indicators Multimodal transportation networks rest upon a combination of costs and performance of transport

Externalities have to be considered within policies aiming at alleviating them. Externalities tend to be at their highest level – C(E) – when no regulations are applied with the assumption (not necessarily proven) that producers and users will try to externalize costs as much as possible under such circumstances. Environmental regulations involve

Author: Dr. Jean-Paul Rodrigue Transportation activities are significant energy consumers, providing mobility to passengers and freight, which accounts for about 25% of world energy use. 1. Energy Human activities depend on using several forms and sources of energy to perform work. The more available and affordable energy sources are, the more

Source: Wikipedia. Built between 2006 and 2008, the extension to the main airport terminal in Marrakech, Morocco, combines modern and traditional elements. Islamic motifs in the arabesques embellish the walls complementing the high sweeping roof and a light-filled environment inside. The extension raised the capacity of the airport to 4.5

Source: UNEP (2010): The GEO Data Portal, as compiled from FAO, TERRASTAT I Global GIS Databases Poverty and Food Insecurity Mapping Project. United Nations Environment Programme. It is possible to assess the suitability of a biophysical area to different forms of crop production, such as cereals, by looking at their

Source: UNEP (2010): The GEO Data Portal, as compiled from FAO, TERRASTAT I Global GIS Databases Poverty and Food Insecurity Mapping Project. United Nations Environment Programme. One of the core determinants of agricultural output is the time available for normal crop growth with photosynthesis. The length of the growing period

A food system is composed of several stages where inputs, agricultural commodities, processed food, and wastes are moving downward and upward a commodity chain: These stages involve complex interactions between biological, economic, and political systems, each subject to risks.

Author: Dr. Jean-Paul Rodrigue Food systems are a sequence of processes to fulfill the demand for food, from farming, processing, and distributing to final use. Global freight distribution systems have enabled a broader scale and scope for commercializing agricultural goods. 1. Food Systems Historically, food production was the dominant focus