MYP Individuals & Societies Land-use Change Notes

How Does Land-Use Change Drive Environmental and Social Change?

1. Land use refers to how people manage and modify land to meet needs such as food production, housing, transport, and energy.
2. When those patterns shift, we call it land-use change.
3. The two big ideas that frame this topic are:
   1. Human choices (in different places and times) can cause global environmental change and may make our current way of life unsustainable.
   2. Population change (growth, migration, and urbanization) can drive social and environmental change, but benefits and costs are not shared equally.

What Are The Common Pathways Land-Use Change Happens Through?

Land-use change includes a range of conversions (one land use replaced by another) and intensifications (the same land used more heavily).

Conversions replace one land use with another

1. Common conversions include:
   1. Deforestation: forest cleared for cropland, pasture, logging roads, or settlements.
   2. Urban expansion: rural land converted into housing, industry, and transport infrastructure.
   3. Wetland drainage: wetlands converted to farming or building land.
   4. Coastal development: mangroves and coastal ecosystems replaced by tourism facilities, ports, or aquaculture.

Note

• A conversion is usually visible in satellite images (for example, forest replaced by rectangular fields).
• Intensification is sometimes harder to see because the land cover may stay similar while management changes (for example, more fertilizer and irrigation on the same cropland).

Intensification uses the same land more heavily

1. Intensification aims to raise output, often through:
   1. Irrigation and water diversion
   2. Increased fertilizer and pesticide use
   3. Mechanization
   4. Double-cropping (more harvests per year)
2. Intensification can reduce pressure to clear new land if it increases yield, but it can also increase pollution and water stress.

What Are The Key Drivers Behind Land-Use Change?

Land-use change has multiple interacting drivers, often operating at local and global scales.

Population change and urbanization increase land demand

1. When populations grow, land is needed for:
   1. Food (expanding farms or raising yields)
   2. Housing and services (urban growth)
   3. Jobs and infrastructure (roads, ports, energy)
2. Population change can therefore trigger new land conversion, and it can also increase competition for land, raising inequality if some groups have weaker land rights.

Globalization and commodity demand connect distant places

1. Rising global demand for commodities (such as beef, palm oil, soy, timber, or minerals) can accelerate land conversion far from where the products are consumed.
2. This connects to an important debate: globalization may drive both development (jobs, export earnings) and destruction (ecosystem loss).

Governance, land tenure, and planning shape outcomes

1. Policies and institutions strongly influence how land is used: