Qidiruv

a branch of preventive medicine, studying the environmental impact on human health, workability and lifetime duration, designing measures, directed on preventing of illnesses and creation of all conditions to provide the health of population.

The maximum or minimum permissible quantitative and/or qualitative indicators established with the aim of limiting of harmful influences on the man's health. Hygiene standards for some pollutants (such as carcinogenic substances) can be stricter than the environmental standards.