ENV4-1: Contaminant discharges in liquid effluents from energy systems
Brief Definition
Contaminant discharges in liquid effluents from all
energy-related activities, including the discharge of
cooling waters, which can raise the temperature of
the watercourse
Units
Kilograms (kg) or milligrams (mg) per litre
Alternative Definitions
Mass emission or concentration in the discharge
Agenda 21
Chapter 17: Protection of the oceans, all kinds of
seas, including enclosed and semi-enclosed seas,
and coastal areas and the protection, rational use
and development of their living resources
Chapter 18: Protection of the quality and supply of
freshwater resources: application of integrated
approaches to the development, management and
use of water resources
POLICY RELEVANCE
(a) Purpose: The purpose of this indicator is to monitor the discharge of harmful
pollutants from energy industries, particularly coal mining and oil extraction, into
rivers, lakes and marine waters.
(b) Relevance to Sustainable Development: Fresh water is a scarce resource in
many parts of the world and needs to be used wisely to ensure and maintain
sustainable quantities of good-quality supplies. Fresh water is used as a source for
potable supply, arable crop irrigation and drinking water for farm animals and is the
habitat for plants, fish species and other wildlife. Polluted water can have a direct
impact on human health and on the ability of livestock and crops to thrive, resulting in
sickly livestock, lower yields and, depending on the pollutant, contaminated farm
produce.
The marine environment is also an important habitat for aquatic life and an important
resource for fishing, aquaculture, tourism and recreation.
Freshwater and marine environments are often fragile habitats, and avoiding the
destruction of these habitats is a priority for ensuring a sustainable future.
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