نتایج جستجو برای: valuing area accumulation

تعداد نتایج: 728994  

Growth indices are useful for interpreting plant reaction to environmental factor. Using Growing Degree Days (GDD) for estimating the phonological growth stages is more valid instead of calendar time. In order to study effect of salinity on growth analysis in three different plantago species, a greenhouse experiment was conducted in Vali-e-Asr University of Rafsanjan in 2009. The study was carr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی و علوم دریایی 1388

this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...

2011
THOMAS HILL

This paper explores the idea that a proper valuing of natural environments is essential to (and not just a natural basis for) a broader human virtue that might be called ʻappreciation of the goodʼ. This kind of valuing can explain, without any commitment to a metaphysics of intrinsic values, how and why it is good to value certain natural phenomena for their own sakes. The objection that such a...

Journal: :Nordic Journal of Health Economics 2018

Journal: :Annals of the New York Academy of Sciences 2010

Journal: :The Journals of Gerontology Series B: Psychological Sciences and Social Sciences 1996

Journal: :Environmental Science & Technology 2006

Journal: :Current Biology 2011
Michael Gross

Nature conservation work has come a long way in just over a century. In the 19th century, species were grouped into useful and harmful ones. Protection, which was beginning to be enshrined in laws and international treaties, was only extended to the useful species. Nuisances such as lions and bears were unflinchingly earmarked for destruction. Since the foundation of the International Union for...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Till Bärnighausen David E Bloom Elizabeth T Cafiero-Fonseca Jennifer Carroll O'Brien

Vaccination has led to remarkable health gains over the last century. However, large coverage gaps remain, which will require significant financial resources and political will to address. In recent years, a compelling line of inquiry has established the economic benefits of health, at both the individual and aggregate levels. Most existing economic evaluations of particular health intervention...

Journal: :Library Trends 2007
Abby Smith

Preservation has value to society over and above the value of the content that is preserved. It is important to articulate this value in order to argue compellingly for the creation of public policies and economic models that adequately support preservation of culturally significant content. This article explores the societal value of preservation, discussing why questions about societal value ...

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