منابع مشابه
Preservation of fertility in nature and ART.
Individuals may regard reproduction as optional but sufficient number of them must be productive to perpetuate the species. The reproductive system is surprisingly vulnerable and depends, among other things, on a limited endowment of oocytes, controlled proliferation of spermatogonial stem cells and the genetic integrity of both. The developmental competence of oocytes and spermatogonial stem c...
متن کاملChoice modelling and its potential application to tropical rainforest preservation
Loss of rainforest occurs in part because of a global market failure problem. Markets routinely transmit signals about international demands for forest products such as timber, but fail to transmit signals about demands for preservation. To make efficient resource allocation choices, decision makers need some framework to estimate the non-use values that might be held by an international commun...
متن کاملThe Preservation of Nature and Natural Resources: the Uncertain Future
1. Background and State of the World 1.1 Pre-Second World War until 1972 1.1.1 Air and Water Pollution 1.1.2 Natural Resource and Wildlife Protection 1.1.3 International Governmental Organization Responses 1.2 1972–1992, The Second Generation of Environmental Issues 1.2.1 The Stockholm Conference 1.2.2 Post Stockholm Developments 1.2.3 The Earth Summit in Rio de Janeiro 1.3 1992–2000 Post-Rio D...
متن کاملWhere the wild things are: environmental preservation and human nature
Environmental philosophers spend considerable time drawing the divide between humans and the rest of nature. Some argue that humans and our actions are unnatural. Others allow that humans are natural, but maintain that humans are nevertheless distinct. The motivation for distinguishing humans from the rest of nature is the desire to determine what aspects of the environment should be preserved....
متن کاملGlobal economic trade-offs between wild nature and tropical agriculture
Global demands for agricultural and forestry products provide economic incentives for deforestation across the tropics. Much of this deforestation occurs with a lack of information on the spatial distribution of benefits and costs of deforestation. To inform global sustainable land-use policies, we combine geographic information systems (GIS) with a meta-analysis of ecosystem services (ES) stud...
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ژورنال
عنوان ژورنال: BioScience
سال: 2003
ISSN: 0006-3568
DOI: 10.1641/0006-3568(2003)053[0435:tnp]2.0.co;2