Managing ocean pollution — Eduqas A-Level Geography

Managing ocean pollution is a critical topic within the WJEC A-Level Geography syllabus, focusing on the sources, impacts, and mitigation strategies of marine pollution. This topic explores how human activities—such as industrial discharge, agricultural runoff, plastic waste, and oil spills—degrade ocean ecosystems, threatening biodiversity, human health, and economic activities like fishing and tourism. Students examine case studies like the Great Pacific Garbage Patch and the Deepwater Horizon oil spill to understand the scale and complexity of the problem.

The topic is situated within the broader theme of 'Global Governance of the Earth's Oceans,' linking to concepts of sustainability, environmental justice, and international cooperation. Students evaluate the effectiveness of policies like the UN Convention on the Law of the Sea (UNCLOS) and the Marine Strategy Framework Directive (MSFD) in the EU. Understanding ocean pollution management is essential for grasping how human-environment interactions shape global challenges and the role of governance in achieving the UN Sustainable Development Goal 14 (Life Below Water).

Mastering this topic requires students to synthesise physical geography (ocean currents, ecosystems) with human geography (policy, economics). It also develops critical thinking about trade-offs between economic development and environmental protection, preparing students for exam questions that demand evaluation of management strategies and their socio-economic implications.

• →Eutrophication: Nutrient enrichment from agricultural fertilisers and sewage causing algal blooms, oxygen depletion, and dead zones (e.g., Gulf of Mexico).
• →Plastic pollution: Accumulation of microplastics and macroplastics, their ingestion by marine life, and biomagnification through food webs.
• →Oil spills: Immediate and long-term impacts on marine organisms, clean-up methods (booms, dispersants), and case studies like Exxon Valdez (1989) and Deepwater Horizon (2010).
• →International governance: Role of UNCLOS, MARPOL (International Convention for the Prevention of Pollution from Ships), and regional agreements like OSPAR for the North-East Atlantic.
• →Circular economy: Strategies to reduce waste through recycling, bans on single-use plastics, and extended producer responsibility (EPR).

• Identification of main sources and causes of ocean pollution (terrestrial run-off, waste disposal, oil spillage).
• Explanation of consequences of ocean pollution (eutrophic dead-zones, plastic garbage patches).
• Understanding the role of ocean currents in the distribution of pollutants.
• Evaluation of management strategies at different scales (global conventions, EU rules, awareness-raising, local actions).
• Application of knowledge to an ocean issues case study exploring interactions between different scales of governance.

• 💡Ensure the case study selected for ocean issues clearly demonstrates the interaction between local, regional, national, and international/global scales.
• 💡Use specific examples of global conventions or EU rules when discussing management strategies.
• 💡Be prepared to explain how ocean currents act as a mechanism for distributing pollutants globally.
• 💡Link the management of marine waste to the concept of the 'Global Commons' where appropriate.
• 💡Use clear geographical terminology when describing pollution processes like eutrophication.
• 💡Use specific case studies to illustrate management strategies. For example, compare the success of the EU's Single-Use Plastics Directive with challenges in implementing bans in developing countries.
• 💡Evaluate the effectiveness of different stakeholders—governments, NGOs, businesses, and individuals—in managing pollution. Show awareness of scale: local beach clean-ups vs. international treaties.
• 💡Link to key geographical concepts like sustainability, interdependence, and the tragedy of the commons. For high marks, discuss the role of technology (e.g., ocean clean-up arrays) and its limitations.

• Failing to link pollution sources to specific consequences (e.g., eutrophication).
• Neglecting the role of ocean currents in the movement of pollutants.
• Confusing management strategies at different scales (e.g., attributing a local action to a global convention).
• Lack of depth in the required ocean issues case study.
• Failing to explicitly address the interaction between different scales of governance.
• Misconception: The ocean can absorb unlimited pollution without harm. Correction: Oceans have a finite capacity; pollution disrupts ecosystems, reduces biodiversity, and can enter the human food chain.
• Misconception: All ocean pollution comes from ships. Correction: Land-based sources (agriculture, industry, urban runoff) account for about 80% of marine pollution.
• Misconception: Biodegradable plastics are a perfect solution. Correction: Many biodegradable plastics require specific conditions to break down and may still persist in marine environments, causing harm.