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[Big Brothers, Big Sisters] (open access)

[Big Brothers, Big Sisters]

Este artículo trata del impacto positivo que Carlos Linares y la organización Big Brothers, Big Sisters tuvieron en un individuo más joven. Se incluyen tanto el artículo original en español como la traducción al inglés.
Date: February 15, 2006
Creator: Castillo, José L.
System: The UNT Digital Library
The Clean Air Act (open access)

The Clean Air Act

The United States Clean Air Act is legislation authorizing the Environmental Protection Agency to control air pollutiants on a national level.
Date: February 24, 2004
Creator: United States. Congress. Senate.
System: The UNT Digital Library
The Global Water System Project: Science Framework and Implementation Activities (open access)

The Global Water System Project: Science Framework and Implementation Activities

Water plays a key role in the development and functioning of society by serving as a basic resource for activities such as irrigation, livestock production, fisheries, aquaculture, and hydroelectric power. Adequate water use in house-holds, businesses and manufacturing is a prerequisite of economic growth. Since many of the world's diseases are waterborne, we need clean water and sanitation for reducing the incidence of these diseases. And, most significantly, water provides habitat and sustenance for a rich diversity of plant and animal species that make up aquatic and riparian ecosystems, providing the basis for many of the goods and services received by society. Society is forcing unprecedented changes on global water resources through worldwide abstraction and pollution of water. Society also has a pervasive indirect impact because anthropogenic greenhouse gas emissions are causing long-term global changes in weather extremes and climate. Changes in the global water system are difficult to understand with simple cause-effect relationships because of the intense and complex linkages and feedbacks between different parts of the system. These changes and linkages also sometimes lead to abrupt changes in water systems such as the eutrophication of coastal aquatic systems, loss of biodiversity, the exceedance of safe water supply in …
Date: February 2005
Creator: The Global Water System Project
System: The UNT Digital Library
Report of the Nineteenth Session of the Intergovernmental Panel on Climate Change (IPCC) (open access)

Report of the Nineteenth Session of the Intergovernmental Panel on Climate Change (IPCC)

Different speakers addressed the Panel. Among other decisions of the Nineteenth Session of the IPCC: the Panel decided that well before the next round of elections the Chair would bring to the Panel a proposal describing the rules and procedures to be adopted by the IPCC when conducting elections. The Panel also decided on the terms of reference, draft table of content and draft workplan for developing definitions for degradation of forest and devegetation of other vegetation types, and methodological options to inventory and report on emissions resulting from these activities.
Date: February 2003
Creator: Intergovernmental Panel on Climate Change (IPCC)
System: The UNT Digital Library
Report of the Twentieth Session of the Intergovernmental Panel on Climate Change (IPCC) (open access)

Report of the Twentieth Session of the Intergovernmental Panel on Climate Change (IPCC)

This meeting focused on the future of the IPCC and discussed on various reports. The Deputy Executive-Director of the UNEP, addressed the Session on key climate and environmental change issues and informed the session about relevant decisions of the 22nd session of the UNEP Governing Council. Among other speakers, Mr Taka Hiraishi, co-chair of the TFB, introduced a report on the development of the Emissions Factors Data Base (EFDB). He noted, inter alia, that the current aim is to develop a recognised library of emissions factors, and that the search for members of the editorial board is not yet complete.
Date: February 2003
Creator: Intergovernmental Panel on Climate Change (IPCC)
System: The UNT Digital Library
IHDP Global Carbon Cycle Research: International Carbon Research Framework (open access)

IHDP Global Carbon Cycle Research: International Carbon Research Framework

The degree to which carbon flows balance each other - human activities leading to carbon emissions into the atmosphere, vegetation and oceans soaking it up - is the subject of vigorous debate. It is not yet possible to define quantitatively the global effects of human activities such as forestry and agriculture, and may never be so. However, studies to determine these effects have emerged as critical for understanding how the earth's climate will evolve in the future. Global concern about the potential implications of the behaviour of the carbon cycle under anthropogenic stress includes concepts of system instability and large scale change. To contribute to understanding this behaviour, and our potential responses to it, requires a thorough investigation of both biophysical and social systems. Until recently, most scientific assessments of such risks focused on the anatomy of conceivable environmental changes themselves, devoting little attention to either the human driving forces or the ecosystems and societies that might be endangered by the changes. Recently, however, questions about the linkage and interaction of social, ecological, and biogeochemical systems are emerging as a central focus of policy-driven assessments of global environmental risks. The approach used here is to accept humans as an integral …
Date: February 2001
Creator: Gupta, Joeeta; Lebel, Louis; Vellinga, Pier & Young, Oran
System: The UNT Digital Library