MYP Individuals & Societies Environmental Challenges Notes

What Are Environmental Challenges In Urban Systems?

1. Cities concentrate people, consumption, and infrastructure in a small area.
2. This concentration increases efficiency, but it also intensifies environmental pressure.
3. Environmental challenges emerge when urban growth increases demand faster than systems can adapt.
4. These challenges are therefore system-level, not individual-level.

Why Does Urban Growth Intensify Environmental Stress?

1. As cities grow, demand rises at the same time for energy, water, transport, housing, and waste disposal.
2. Each new resident adds pressure, but infrastructure expands slowly and in large stages.
3. This creates a gap between demand and capacity.

How Does Pollution Become A Systems Problem In Cities?

1. Urban pollution rarely has one cause.
2. It is produced by overlapping systems:
   1. Transport systems create air pollution through congestion and emissions.
   2. Energy systems release pollutants from power generation.
   3. Waste and drainage systems contaminate land and water when overloaded.
3. Because these systems interact, pollution compounds rather than staying isolated.

Why Do Cities Depend On Linear Resource Systems?

1. Most cities operate on linear systems: resources are extracted, used, and disposed of.
2. This supports short-term growth, but it creates long-term problems.
3. Cities rely on distant ecosystems for energy, water, and food, while exporting waste elsewhere.
4. This allows cities to appear efficient locally, while shifting environmental damage beyond city boundaries.
5. As population and consumption increase, linear systems struggle to cope, leading to waste accumulation and resource depletion.

Why Are Urban Environmental Challenges Hard To Fix Quickly?

1. Cities change slowly.
2. Infrastructure upgrades are expensive and take time, while population growth and consumption continue.
3. Political decisions often prioritize short-term needs, even though environmental challenges build over decades.
4. As a result, cities often manage symptoms, such as pollution peaks or waste crises, rather than redesigning the systems that cause them.

How Does This Prepare You For Sustainable Urban Management?

1. Understanding environmental challenges explains why sustainable management focuses on system redesign, not individual behaviour.
2. Solutions aim to change how cities are structured, how resources flow, and who is exposed to environmental harm.