precursor

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The term precursor occurs in indexes or keywords of following Zvon materials:

Keywords: United Nations Convention against Illicit Traffic in Narcotic Drugs and Psychotropic Substances (1988) : precursor [Keywords]
traffic in narcotic drugs and psychotropic substances pose a serious threat to the health and welfare of human beings and adversely affect the economic, cultural and political foundations of society
The Framework Convention on Climate Change (1992) : precursor [Keywords]
achieve stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system achieved within a time-frame sufficient to allow ecosystems to adapt naturally to climate change, to ensure that food production is not threatened and to enable economic development to proceed in a sustainable manner

Zvon keyword: precursor