10 Environmental geography: Resources and sustainability
10.0.1 Definition
- Environmental geography studies the interactions between humans and their natural environment, including resource use, sustainability, and climate change.
10.0.2 Why it matters
- Human activities have altered the Earth’s ecosystems.
- Natural resource depletion threatens global stability.
- Climate change is reshaping societies, economies, and politics.
10.0.3 Key Questions in Environmental Geography
- How do human activities impact the environment?
- What are the challenges of managing natural resources?
- How can sustainability balance economic growth and environmental protection?
- What are the causes and consequences of climate change?
10.1 Natural Resources and Their Management
10.1.1 Types of Natural Resources
| Type | Description | Examples |
|---|---|---|
| Renewable Resources | Can be replenished naturally over time | Solar, wind, forests, water |
| Non-Renewable Resources | Finite supply, takes millions of years to form | Coal, oil, natural gas, minerals |
| Perpetual Resources | Always available, not affected by human use | Sunlight, wind, ocean waves |
Case Study: The Amazon Rainforest and Resource Exploitation
- Deforestation for agriculture (soy, cattle ranching) and logging.
- Loss of biodiversity and carbon storage capacity.
- Efforts to manage: Brazil’s reforestation programs, Indigenous land rights.
10.1.2 The Tragedy of the Commons (Garrett Hardin, 1968)
- Shared resources (oceans, forests, atmosphere) are often overused and degraded.
- Example: Over-fishing in international waters leads to fish population collapse.
- Solutions: Regulation, conservation policies, sustainable resource management.
10.2 Sustainability and Development
10.2.1 What is Sustainability?
Sustainability means meeting current needs without compromising future generations.
The Three Pillars of Sustainability:
- Environmental: Protecting ecosystems and biodiversity.
- Economic: Sustainable business practices and green technologies.
- Social: Reducing inequality and improving living standards.
10.2.2 Sustainable Development Goals (SDGs)
The UN’s 17 SDGs aim to balance economic growth with environmental protection.
Key SDGs related to environmental geography:
- Goal 7: Affordable and clean energy.
- Goal 12: Responsible consumption and production.
- Goal 13: Climate action.
Case Study: Denmark – A Leader in Renewable Energy
- Invested heavily in wind energy, now generating 50% of electricity from renewables.
- Green building designs and sustainable urban planning.
10.3 Climate Change and Its Impact
10.3.1 What is Climate Change?
Long-term shifts in temperature, precipitation, and extreme weather patterns.
Causes:
- Natural Factors (volcanic eruptions, solar radiation).
- Human Activities (burning fossil fuels, deforestation).
10.3.2 Greenhouse Effect and Global Warming
Greenhouse gases (GHGs) trap heat in Earth’s atmosphere.
Main GHGs:
- Carbon dioxide (CO₂) – Burning fossil fuels.
- Methane (CH₄) – Agriculture, livestock.
- Nitrous oxide (N₂O) – Fertilizers, industrial processes.
Global temperature has risen by ~1.2°C since pre-industrial times (IPCC, 2023).
Case Study: Rising Sea Levels and Coastal Cities
- Maldives, Bangladesh, and Florida face flooding due to rising oceans.
- Solutions: Sea walls, climate migration planning, carbon reduction.
10.4 Environmental Challenges and Policies
10.4.1 Deforestation and Land Degradation
- Causes: Agriculture, logging, infrastructure expansion.
- Impacts: Loss of biodiversity, increased CO₂ emissions.
- Solution: Reforestation, agroforestry, sustainable land management.
10.4.2 Air and Water Pollution
- Causes: Industrial waste, vehicle emissions, plastics in oceans.
- Impacts: Health issues (lung diseases, waterborne illnesses). = Solution: Green technology, emissions regulations, waste recycling.
Case Study: China’s Air Pollution Crisis
- Rapid industrialization led to smog-filled cities.
- Government action: Air quality monitoring, coal reduction, electric vehicles.
10.4.3 Global Environmental Policies and Agreements
| Agreement | Purpose | Example of Action |
|---|---|---|
| Kyoto Protocol (1997) | Reduce greenhouse gas emissions | First international climate treaty |
| Paris Agreement (2015) | Limit global warming to below 2°C | Countries set emission reduction goals |
| Montreal Protocol (1987) | Protect ozone layer | Banned CFCs in aerosol sprays |
10.5 Solutions for a Sustainable Future
10.5.1 Renewable Energy Transition
- Solar, wind, hydro, and geothermal energy replacing fossil fuels.
- Example: Germany’s “Energiewende” policy promotes renewable electricity.
10.5.2 Circular Economy and Waste Management
- Recycling and reusing materials to minimize waste.
- Plastic bans and biodegradable packaging.
- Example: Sweden recycles 99% of household waste.
10.5.3 Green Urban Planning
- Sustainable cities with efficient public transport and green spaces.
- Vertical farming and smart water management.
- Example: Singapore’s eco-friendly city design.**
10.6 Takeaway
- Environmental geography helps us understand human impact on natural systems.
- Sustainability requires balancing environmental, economic, and social goals.
- Climate change is a major challenge, requiring global cooperation.
10.7 Brainstorming
- What are the biggest environmental challenges facing the world today?
- How can economic growth and sustainability coexist?
- Should governments enforce stricter environmental policies?
- What role do individuals play in combating climate change?