Sustainable Development
What is Sustainable Development?
Sustainable development is economic growth that meets present needs without compromising the ability of future generations to meet theirs.
It balances economic, environmental, and social goals, recognizing that depleting natural resources or the climate undermines long-run growth. It underlies green-growth and ESG policy debates.
Sustainable Development: a worked example
A country manages a forest of 1,000,000 mature trees that regrows at 4 percent a year, adding 40,000 trees annually. Harvesting exactly 40,000 leaves the stock unchanged, so the timber income can continue indefinitely. Suppose loggers cut 60,000 instead. Year one closes with 1,000,000 plus 40,000 minus 60,000, or 980,000 trees. The smaller stock regrows less, only 39,200 trees, so year two loses more ground than year one. Carried forward for a decade the stock falls to roughly 760,000 and annual regrowth slips to about 30,400 trees, below even the original sustainable harvest. Measured output is higher in every one of those years than under the steady plan, and the extra income is exactly what the shrinking asset paid for. Sustainable development asks for the first path, or for the harvest proceeds to be reinvested in capital worth as much as the forest that financed it.
The mistake students make with sustainable development
The usual error reads sustainable development as a demand for zero growth, or as an environmental slogan with no economic content. Neither fits the definition. A country may draw down oil or timber and still qualify, provided the proceeds are converted into schools, machinery, or renewable capacity that leaves the next generation's productive capacity no smaller. That substitution assumption is doing real work, and it fails for anything with no manmade replacement, such as a stable climate or a lost species, which is why some economists insist certain natural stocks be held intact whatever the proceeds buy.
Sustainable Development questions
What is the difference between economic growth and sustainable development?
Economic growth measures the rise in output over a period, usually real GDP or real GDP per person, and says nothing about where that output came from. Sustainable development adds a constraint on the source, asking whether the capital stock behind the output, natural capital included, is still intact at the end of the period. The two come apart in both directions. Growth financed by drawing down an ore body fails the test, and a stagnant economy eroding its soils fails it as well.
Why does GDP fail to measure sustainability?
GDP counts flows of production inside a period and ignores changes in the stocks that generated them. Felling a forest, draining an aquifer, or eroding topsoil all add to output when the resource is sold, yet the depletion never registers as a cost, unlike the depreciation of a factory. Green accounting closes part of the gap by subtracting resource depletion and pollution damage, producing an adjusted figure that falls when a country consumes its natural capital.
What are the three pillars of sustainable development?
Economic, environmental, and social goals make up the three pillars. The economic pillar covers incomes, employment, and productive investment. The environmental pillar covers the resource base, pollution, and climate stability. The social pillar covers health, education, and how fairly the gains are shared. A policy that advances one pillar while wrecking another, such as a growth push that poisons a watershed, fails the test, which is why the label is normally applied to a whole policy package rather than to a single project.
Related terms
Common comparisons
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