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O

OHSAS 18001
OHSAS 18001 (Occupational Health and Safety Assessment Series) certification defines the requisites of a WSH (Workers’ Safety and Health) Management System. These requisites are to be fulfilled by the company and verified by a body that is qualified to issue the relevant Certificate of Compliance.


OECD

This acronym stands for Organization for Economic Cooperation and Development. It deals with developing forms of economic cooperation and coordination between the 30 member countries, the 70 developing countries, NGOs and civil society.

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Option value


It refers to the decision not to use a natural resource. This decision is associated with the option of acting in the future in two possible ways: deciding to use the resource as it has always been used, or to use it on the basis of new needs.


P

Pressure Factors
Anything that contributes to undermining the stability of the steady state (pollutants, the use of non-renewable resources, waste, etc.).