Download or read book The Basin of Mexico written by Exequiel Ezcurra and published by . This book was released on 1999 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The book examines some of these questions in a historic perspective, arguing that the depletion of natural resources in the Basin of Mexico is not just a recent phenomenon."--BOOK JACKET.
Download or read book Water Quality written by Hlanganani Tutu and published by BoD – Books on Demand. This book was released on 2017-01-18 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: As concerns increase over the scarcity of water resources and the role of anthropogenic activities, water quality is evermore important. Activities ranging from agriculture to mining have had a bearing on the quality of water that they impact. Several studies assessing such impacts have been conducted at local and global scales over the years. This book, consisting of contributions by authors in various water-related fields, delves into some approaches that are used to understand and/or to improve water quality, and these include assessment of water chemistry, biomonitoring, modelling and water treatment. This book will be useful to environmental scientists, water professionals, researchers, academics and students.
Download or read book Regions at Risk written by Jeanne X. Kasperson and published by UN. This book was released on 1995 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human-induced environmental change is to be found throughout the world, but there are areas that scientists consider to be "critical regions" - regions that are particularly vulnerable to or suffering from environmental degradation. In this volume nine such "critical environmental regions" (Amazonia, the Aral Sea basin, the middle mountains of Nepal, Kenya's Ukambani region, the US Southern High Plains, the Mexico Basin, the North Sea, the Ordos Plateau of China, and the eastern Sundaland region of South-East Asia) are examined as case-studies. In chapter one the authors provide a detailed look into the concepts of environmental criticality and endangerment and propose formal definitions. The nine regional studies that follow in the subsequent chapters serve to translate the conceptual framework into the physical and social realities of each area. The case-studies make available an up-to-date synthesis of vast amounts of inaccessible data, and as such will be valuable to scholars and policy makers interested in specific areas of the world and others interested in regional comparisons. Anyone concerned with global environmental change, criticality, human-environment interactions, and how societies in different regions have responded to environmental degradation will find much that is new and important in this pioneering, innovative study.
Download or read book Handbook of Ecological Restoration written by Martin R. Perrow and published by Cambridge University Press. This book was released on 2002-09-05 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume handbook is a comprehensive account of the rapidly emerging and vibrant science of the ecological restoration of habitats and species. Ecological restoration aims to achieve complete structural, functional, self-maintaining biological integrity following disturbance. In practice, any theoretical model is modified by a number of economic, social, and ecological constraints. Consequently, material that might be considered as rehabilitation, enhancement, re-construction, or re-creation is also included. Principles of Restoration defines the underlying principles of restoration ecology in relation to manipulations and management of the biological, geophysical, and chemical framework.
Download or read book Wetland Indicators written by Ralph W. Tiner and published by CRC Press. This book was released on 1999-04-21 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understand the current concept of wetland and methods for identifying, describing, classifying, and delineating wetlands in the United States with Wetland Indicators - capturing the current state of science's role in wetland recognition and mapping. Environmental scientists and others involved with wetland regulations can strengthen their knowledge about wetlands, and the use of various indicators, to support their decisions on difficult wetland determinations. Professor Tiner primarily focuses on plants, soils, and other signs of wetland hydrology in the soil, or on the surface of wetlands in his discussion of Wetland Indicators. Practicing - and aspiring - wetland delineators alike will appreciate Wetland Indicators' critical insight into the development and significance of hydrophytic vegetation, hydric soils, and other factors. Features Shows 55 color plates, documenting wetland indicators throughout the nation - with more than 34 soil plates and aerial photos Illustrates other wetland properties with more than 50 figures Provides over 60 tables, including extensive tables of U.S. wetland plant communities and examples for determining hydrophytic vegetation Contents Wetland Definitions Wetland Concepts for Identification and Delineation Plant Indicators of Wetlands and Their Characteristics Vegetation Sampling and Analysis for Wetlands Soil Indicators of Wetlands Wetland Identification and Boundary Delineation Methods Problem Wetlands and Field Situations for Delineation Wetland Classification Wetlands of the United States: An Introduction, With Emphasis on Their Plant Communities Wetland Mapping and Photointerpretation
Download or read book The Extent of Poverty in Latin America written by Oscar Altimir and published by . This book was released on 1982 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work originated in a research project for the measurement and analysis of income distribution in the Latin American countries, undertaken jointly by the Economic Commission for Latin America and the World Bank. The present paper presents estimates of the extent of absolute poverty for ten Latin American countries and for the region as a whole in the 1970s, on the basis of available household surveys and population censuses. They are based on country-specific poverty lines representing minimum acceptable levels of private consumption, drawn according to a food-based method. Such poverty lines - ranging from 150 to 250 dollars of annual household consumption per capita - express a normative definition of the absolute dimensions of poverty, partly based on expert appraisals and partly reflecting the actual behavior of low income households facing the life style projected by Latin American development. According to these estimates, 40 percent of Latin American households were poor at the beginning of the 1970s, the incidence of poverty being 26 percent in urban areas and 60 percent in rural areas. Urban poverty extended to more than one-third of urban households in some countries (Brazil, Colombia, Honduras) while affecting between 20 and 30 percent in others (Peru, Mexico, Venezuela), about 15 percent in Costa Rica and Chile and less than 10 percent in Argentina and Uruguay. The extent of poverty in rural areas would not be less than 20 percent in any case and would reach more than 60 percent in some countries. The corresponding poverty gaps were also estimated; in terms of total household income, they may represent manageable proportions (around 2-3 percent) in the better-off countries, but are in the 4-8 percent range in the bigger countries of the region and reach as much as 12 percent in Peru and 17 percent in Honduras.
Download or read book Human Settlements and Planning for Ecological Sustainability written by Keith Pezzoli and published by MIT Press. This book was released on 2000 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: In many areas of the world, environmental degradation in and around human settlements is undermining prospects for both socioeconomic justice and ecological sustainability. To explore the issues involved in this worldwide problem, Keith Pezzoli focuses on a dramatic instance of conflict that grew out of the unauthorized penetration of human settlements into the Ajusco greenbelt zone, a vital part of Mexico City's ecological reserve. The heart of the book is the story of what happened when residents of the Ajusco settlements fought relocation by proposing that the areas be transformed into productive ecology settlements. Pezzoli draws upon urban and regional planning theory and practice to examine biophysical as well as ethical and social sides of the story, and he uses the Mexican experience to identify planning strategies to link economy, ecology, and community in sustainable development. -- Publisher description.
Download or read book Mega city Growth and the Future written by Roland J. Fuchs and published by United Nations University Press. This book was released on 1994 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines a range of issues related to the mega-city phenomenon. Part one deals with the growth of mega-cities and explores demographic issues, labour force change in the big cities of Asia, the effect of macroeconomic forces on the world city system, and the relations between technology and the city. In part two, the discussion focuses on the economic and social consequences of mega-city growth. Part three looks at the crucial issue of the management of mega-cities, taking up such issues as infrastructure financing, land and shelter needs, transportation, and environmental management. The final chapter examines priority urban management issues in developing countries and derives a research agenda for the 1990s. (Adapté du résumé de l'éditeur).
Download or read book The Biology of Freshwater Wetlands written by Arnold G. van der Valk and published by OUP Oxford. This book was released on 2012-02-09 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global wetlands exhibit significant differences in both hydrology and species composition and range from moss-dominated arctic peatlands to seasonally-flooded tropical floodplains. They are increasingly recognized for the important services that they provide to both the environment and human society such as wildlife and fish production, nutrient filtering, and carbon sequestration. A combination of low oxygen levels and dense plant canopies present particular challenges for organisms living in this aquatic habitat. This concise textbook discusses the universal environmental and biological features of wetland habitats, with an emphasis on wetland plants and animals and their adaptations. It also describes the functional features of wetlands - primary production, litter decomposition, food webs, and nutrient cycling - and their significance locally and globally. The future of wetlands is examined, including the potential threats of global climate change and invasive species, as well as their restoration and creation. This new edition maintains the structure and style of the first, but is fully updated throughout with new chapters on invasive species, restoration/creation, global climate change, and the value of wetlands.
Download or read book The Sustainability Transition written by and published by . This book was released on 1996 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Growth and Policies in Mega cities written by United Nations. Department of International Economic and Social Affairs and published by New York : United Nations. This book was released on 1991 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wetland Plants written by Julie K. Cronk and published by CRC Press. This book was released on 2016-04-19 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed account of the biology and ecology of vascular wetland plants and their applications in wetland plant science, Wetland Plants: Biology and Ecology presents a synthesis of wetland plant studies and reviews from biology, physiology, evolution, genetics, community and population ecology, environmental science, and engineering. It provides a
Download or read book Beyond Mexico written by Jean Daudelin and published by McGill-Queen's Press - MQUP. This book was released on 1995-03-15 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a result of the North American Free Trade Agreement Canada's relations with Mexico and Latin America have reached a turning point both politically and economically. Beyond Mexico is a timely assessment of the dynamic state and the prospects of Canada's relations with Latin America. Every day, trade developments under nafta are redefining political, economic and social connections between Canada, Mexico and the United States. In this well-documented, policy-relevant and eminently accessible study, specialists address the challenges raised by non-governmental organizations, security and human rights issues, inter-municipal exchange programs, Canada's membership in the Organization of American States, and by successive crises in Haiti. This collection looks beyond NAFTA to explore the range and realities of Canada's involvement in the entire hemisphere.
