All Flashcards
How do POPs move through the environment?
Airborne transport, waterborne transport, biomagnification, deposition.
Describe the process of bioaccumulation.
Organisms absorb POPs from their environment; POPs accumulate in their tissues faster than they can be metabolized or excreted.
Describe the process of biomagnification.
POPs increase in concentration as they move up the food chain because predators consume prey containing POPs, leading to higher concentrations in the predators.
What is the process of POP deposition?
POPs settle out of the air or water and accumulate in soil and sediments.
How does airborne transport affect POP distribution?
Wind carries POPs far from their source, leading to widespread contamination.
How does waterborne transport affect POP distribution?
Rivers and oceans move POPs around, spreading contamination to different areas.
Describe the process of POPs entering the food chain.
POPs contaminate water and soil; small organisms absorb them; larger organisms eat the smaller ones, leading to biomagnification.
How do POPs impact top predators?
Top predators accumulate high concentrations of POPs through biomagnification, leading to health problems and reproductive issues.
What is the role of soil in POP transport?
Soil acts as a reservoir for POPs, which can then be released into the air or water, continuing the cycle of contamination.
Describe how POPs can move from soil to plants.
Plants can absorb POPs from contaminated soil through their roots, introducing them into the food chain.
What is the significance of long-range transport for POPs?
POPs can travel far from their source via air and water, impacting distant ecosystems.
Why are POPs fat-soluble?
They accumulate in fatty tissues of organisms, leading to bioaccumulation and biomagnification.
What is the main goal of the Stockholm Convention?
To protect human health and the environment from POPs by eliminating or restricting their production and use.
Why are POPs a concern for human health?
They can cause cancer, neurological issues, developmental problems, and disrupt endocrine systems.
What makes DDT a harmful POP?
It causes eggshell thinning in birds, leading to population declines.
What makes PCBs a harmful POP?
Industrial chemicals linked to cancer and developmental issues.
What makes Dioxins a harmful POP?
Toxic byproducts of industrial processes.
Explain the impact of POPs on endocrine systems.
POPs disrupt endocrine systems, leading to hormonal imbalances.
Why are POPs considered 'forever chemicals'?
They persist in the environment for a very long time without breaking down easily.
How do POPs affect wildlife?
POPs can cause reproductive problems, developmental issues, and increased susceptibility to diseases in wildlife.
What does the Stockholm Convention aim to do?
Eliminate or restrict the production and use of POPs globally.
What are the key objectives of the Stockholm Convention?
Protect human health and the environment from POPs, promote best available technologies, and provide assistance to developing countries.
What is the role of the Conference of the Parties (COP) in the Stockholm Convention?
The COP reviews and assesses the implementation of the Convention every two years.
How many parties are part of the Stockholm Convention?
179 Parties (as of 2021), including the European Union.
What is the significance of Annex A in the Stockholm Convention?
It lists POPs that are banned for production and use, aiming for their elimination.
What is the significance of Annex B in the Stockholm Convention?
It lists POPs that are restricted for production and use, allowing specific exemptions.
What is the significance of Annex C in the Stockholm Convention?
It lists chemicals under review for future inclusion, based on scientific evidence of their POP characteristics.
How does the Stockholm Convention address legacy POPs?
It encourages the environmentally sound management and disposal of stockpiles and wastes containing POPs.
What are the challenges in implementing the Stockholm Convention?
Lack of resources, technical capacity, and awareness in some countries hinder effective implementation.
How does the Stockholm Convention promote international cooperation?
It facilitates information exchange, technical assistance, and financial support among parties to address POPs.