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21 Cards in this Set
- Front
- Back
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Point source
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Waste that comes from a single point, specified site or location. Eg. Pipe or chimney
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Diffuse Source
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Occurs when there is no single point where waste the emissions enter the environment. Eg. Highway or landfill
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Pollutant
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Something that when released into the environment causes some harm or alters the environment in a negative way.
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Source
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The origin or starting point where a pollutant enters the environment
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Sink
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A place or process that removes stores or absorbs the pollutant. Wetlands are a pollutant sink for heavy metals and other materials.
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Persistence
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The time that the pollutant takes to break down. Substances that are not easily broken down are said to be persistent. A pollutant is degradable if it breaks down with sunlight, soil, water or in chemical reactions.
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Toxicity
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Is the measure of harm (death or illness) a substance can cause in humans and other living things.
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Chronic toxicity
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Causing harm over a long period of repeated exposures.
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Acute toxicity
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Causing harm after a single exposure
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Dispersal / Transport mechanisms
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The way that a pollutant is spread or moves around the environment. Dispersal can be airborne, water borne or in soils.
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Exposure
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The degree of time spent near or in contact with the pollutant. The level of exposure is related to the pollutant.
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LD50
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Is the term used to describe the dose of a substance that is sufficient to kill a percentage (50%) of the specified test animal within a specified period. The smaller the LD50 dose the more toxic a substance is
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Environmental Risk Assessment (ERA)
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Identify and evaluate the environmental risks of implementing policies.
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Environmental Management System (EMS)
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Audit, Plan, Implement and Monitor environmental policy to assess ongoing effectiveness of environmental practises.
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Life Cycle Analysis (LCA)
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Implement a 'whole of lifetime' analysis of a product to increase efficiency of resource use and disposal.
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Environmental Impact Assessment (EIA)
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Identify and evaluate the environmentla effects of a proposed development prior to major decisions being made.
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Stakeholders
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People, companies and government bodies with an interest in a project or development.
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Bioaccumulation
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Refers to the accumulation of substances, such as pesticides, or other organic chemicals in an organism.
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Biomagnification
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The increase in concentration of a substance, such as the pesticide DDT, that occurs in a food chain.
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Eutrophication
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The increase in nutrients required for plant growth that results in oxygen depletion in water ways, lakes and dams.
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Salinity
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The measurement of salt in soil or water.
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