Current environmental

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  • Written by a multidisciplinary group of scientists from around the globe Environmental Restoration of Metals-Contaminated Soils provides a summary of the current environmental remediation technology.

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  • An Ecosystem Approach provides a modern perspective of insect ecology that integrates two approaches traditionally used to study insect ecology: evolutionary and ecosystem. This integration substantially broadens the scope of insect ecology and contributes to prediction and resolution of the effects of current environmental changes, as these affect and are affected by insects. The third edition includes an updated and expanded synthesis of feedback and interactions between insects and their environment.

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  • On behalf of my late husband, David Liu, I would like to convey his sincere gratitude and respect for all the coauthors who helped, directly or indirectly, currently or in the past, in this product’s development. With your help, he accomplished his goal: a comprehensive, authoritative, and current reference. The valuable expertise, strong support, and dedication of all the coauthors will make the Environmental Engineers’ Handbook an unqualified success

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  • The rapid pace in which trace analysis is changing has warranted the writing of a second edition in a relatively short period. What is new? The second edition attempts to move the reader from the most elementary of principles of trace environmental quantitative analysis (TEQA) to those techniques and applications currently being practiced in analytical laboratories dedicated to trace environmental chemical and trace environmental health quantitative analysis while adding new significant topics....

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  • The past century has seen a tremendous expansion in the number of synthetic chemicals employed by humankind as materials, drugs, preservatives for foods and other products, pesticides, cleaning agents, and even weapons of war. An estimated 64,000 chemicals are currently in use commercially, with 5 billion tons being produced annually in the world. Some 4000 chemicals are used as medicinals and at least 1200 more as household products. An estimated 700 new chemicals are synthesized each year.

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  • Presence of epigenetic marks enables cells with the same genotype have potential to display different phenotypes and differentiate into many cell-types with different functions, and responses to environmental and intercellular signaling. For example, DNA methylation is essential for the process of imprinting. Imprinted genes are expressed from only one parental allele. This mono-allelic gene expression is directed by epigenetic marks established in the mammalian germ line and a single mutation, either genetic or epigenetic, can cause disease.

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  • This study looks at whether Vietnam could adopt the Payment for Environmental Services (PES) approach as part of its national conservation strategy. Using a pilot study in the country’s uplands, it investigates how such a scheme might run and assesses its impact on the environment and on the local people’s livelihoods. Through a review of current Vietnamese conservation practice, it assesses the barriers to the adoption of such schemes and the factors that might encourage their implementation....

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  • The guidelines are targeted at public health professionals involved in prevent- ing health risks of environmental exposures as well as specialists and authorities involved in the design and use of buildings, indoor materials and products. The guidelines are based on the accumulated scientific knowledge available at the time of their development. They have the character of recommendations. Nev- ertheless, countries may wish to use the guidelines as a scientific basis for legally enforceable standards.

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  • Over the past 2 decades the implications of endocrine disruption and modula- tion have permeated public consciousness, scienti fi c inquiry, regulatory frame- works, and management decisions in the environmental and biomedical sciences.

    pdf302p namde01 11-04-2013 18 5   Download

  • During the past twenty-five years there has been an exponential growth in the number of environmental and natural resource conflicts. They occur at local, regional, national and international levels and encompass an ever increasing range of issues. Many have proven to be very difficult to successfully resolve. A look at just a few arenas where conflicts have emerged illustrates this trend.

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  • The authors would like to thank the many people from throughout NASA Ames and particularly Dr. S. Pete Worden, Center Director, Deborah Feng, Director of Center Operations, and John Adams and Charlotte Barton, of the Logistics and Documentation Services Division, and Gary Martin, Director of the New Ventures and Communications Directorate, Jeff Smith, Deputy Chief, Entrepreneurial Initiatives Division, and Julie Fletcher, Lockheed-Martin, for their support in the production of the report.

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  • Air pollution was on an unsustainable track causing photochemical smog and acid depositions, along with health disasters and increased mortality. Indicators, such as acid and sulfate depositions, ambient levels of pollutants, and asthma hospitalizations, that show the current track are decreasing but are still at detrimental levels. Chapter 21 provides knowledge of air pollution.

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  • In this chapter, students will be able to understand: How many people live in the world today? How many people live in poverty? What is the current rate of world population growth? What is the demographic constant used to calculate population doubling time? What percent of the worlds wealth is controlled by developed and developing countries respectively? What proportion of the human population lives in developing countries?

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  • This 1993 document entitled "Assessment of Sources of Air, Water, and Land Pollution: A Guide to Rapid Source Inventory Techniques" provides techniques for conducting source inventories in Chapter 2 and describes models for estimating air emissions under current controls in Chapter 3. Appendix II includes the United Nations (UN) classification of industries and services.

    pdf230p anhthaopro 13-04-2011 333 88   Download

  • The use of aeration in the wastewater treatment field has been in existence for over a century. Each of the authors has been involved with the theory and application of aeration systems for a little less than half a century. It was a daunting task to put together what we considered the important principles underlying the mechanisms involved in aeration and show how they are applied in practical applications.

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  • The most significant issues facing mankind today are related to the quality of our environment. Past decisions did not always consider environmental factors as critical elements. However, current decisions made daily should reflect the importance of the environment. All environment-related issues are multidisciplinary, ranging from science and engineering to social, economic, and regulatory issues. Further, these issues are not related to any one region or country, but are global in nature, requiring multidisciplinary, multiorganizational, and multinational educational efforts....

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  • Many have endeavored to make our outdoor environment cleaner and safer. The learning process that occurred showed us the limitations of our planet and also the sustainability of our ecosystem if given a chance. As a community, we learned about the water, the soil, and the air. We learned about the underground river that flowed to the surface lake. We learned about air currents that transported airstreams around our globe. We discovered the reality of plate tectonics and the ever-changing hydrogeological system.

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  • Recent major earthquakes around the world have shown the vulnerability of infrastructure and the need for research to better understand the nature of seismic events and their effects on structures. As a result, earthquake engineering research has been expanding as more and more data become available from a large array of seismic instruments, large scale experiments and numerical simulations.

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  • Weeds severely affect crop quality and yield. Therefore, successful farming relies on their control by coordinated management approaches. Among these, chemical herbicides are of key importance. Their development and commercialization began in the 1940's and they allowed for a qualitative increase in crop yield and quality when it was most needed. This book blends review chapters with scientific studies, creating an overview of some the current trends in the field of herbicides.

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  • This book aspires to be a comprehensive summary of current biofuels issues and thereby contribute to the understanding of this important topic. Readers will find themes including biofuels development efforts, their implications for the food industry, current and future biofuels crops, the successful Brazilian ethanol program, insights of the first, second, third and fourth biofuel generations, advanced biofuel production techniques, related waste treatment, emissions and environmental impacts, water consumption, produced allergens and toxins....

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