GDP fails to measure sustainability because it records economic production but omits resource depletion, environmental damage, inequality, and long-term well-being. Green GDP adjusts GDP by deducting the monetary costs of resource depletion and environmental degradation.
Why GDP Is an Incomplete Indicator
In IB ESS Subtopic 1.3 Sustainability (SL and HL), gross domestic product (GDP) is an economic indicator that neglects natural systems. GDP may rise while conditions needed by future generations deteriorate.
For example, logging a forest increases GDP through timber sales, but GDP does not subtract lost natural capital, carbon storage, habitats, water regulation, or cultural value. Cleaning up an oil spill may also raise GDP through spending, although environmental quality has declined.
| Measure | What it includes | Main limitation |
|---|---|---|
| GDP | Market value of final goods and services | Ignores environmental and social costs |
| Green GDP | GDP adjusted for resource depletion and environmental degradation | Environmental damage is difficult and controversial to value |
A simplified relationship is:
If GDP is 500 billion monetary units, while resource depletion costs 30 billion and pollution damage costs 20 billion, Green GDP is 450 billion. This indicates that some apparent growth depended on reducing the environmental capacity available to future generations.
The common misconception is that higher GDP automatically means greater development or sustainability. GDP measures economic activity; sustainability concerns the long-term viability of interconnected environmental, social, and economic systems. Green GDP is broader, but still struggles to price intrinsic value, biodiversity loss, unpaid work, and unequal exposure to pollution.
Exam Technique
For an explain question, state what GDP measures and link its omissions to unsustainable resource use. For evaluate, balance Green GDP's improved environmental accounting against valuation uncertainty, then give a supported conclusion. Green GDP is a useful extension, but it is not a named sustainability model required by Subtopic 1.3.
