The Sustainable Development Trilemma: Is It Possible to Growth, Distribute, and Decarbonize?
By Douglas Alencar (CFC-GS/UFPA) Current macroeconomic policymaking faces a major challenge: the sustainability trilemma. Governments are expected to achieve three fundamental objectives simultaneously: boosting economic growth, promoting income distribution, and ensuring the reduction of CO₂ emissions. The problem is that, without intentional state coordination, expanding production and improving wages tend to put pressure on energy consumption and polluting inputs, creating a direct tension between social goals and ecological targets. From a macroeconomic perspective, the level of economic activity and the growth trajectory are not determined solely by the supply of production factors, but rather by aggregate demand, with central emphasis on private and public investment. When investment levels rise, capacity utilization increases and output expands. However, in a conventional productive structure dependent on fossil fuels, higher economic growth translates directly into greater demand for energy and carbon intensity, feeding back into emissions unless there is a shift in the technological base. When incorporating income distribution into the analysis, the issue grows more complex. The division of output between wages and profits (the wage share) shapes society’s consumption and savings patterns. Since workers have a substantially higher propensity to consume than capital owners, policies that raise the wage share boost household consumption and aggregate demand. However, the need to decarbonize the economy imposes a ceiling on the use of traditional energy sources. If output expansion remains tied to a carbon-emitting productive matrix, the ecological goal forces a slowdown or creates supply-side bottlenecks. The trilemma is thus established: how can we maintain growth and social inclusion without breaching the planet’s environmental limits? The trilemma is not an insurmountable contradiction, but rather a public policy coordination challenge. To align growth, equity, and sustainability, the state must act in an articulated manner across four structural fronts: The state must lead the ecological transition through direct investments in clean infrastructure, decarbonized mass transit, and renewable energy. This public investment generates aggregate demand, sustaining growth and employment, while replacing the polluting matrix with low-carbon technologies. It is essential to raise the economy’s technological level through targeted innovation policies. The goal is to accelerate decoupling between economic activity and CO₂ emissions, drastically reducing the amount of carbon required to produce each unit of output. Reducing social inequality must be accompanied by incentives for low-environmental-impact goods and services. Progressive tax reforms combined with the strengthening of public services (health, education, sanitation) increase population well-being without necessarily demanding massive consumption of carbon-intensive goods. The monetary authority must act actively in steering financial flows. This includes using differentiated macroprudential policies (requiring lower reserve requirements for green financing) and implementing targeted credit facilities for transition projects, discouraging the financing of fossil-intensive sectors and reducing climate risk within the financial system. In summary, the sustainable development trilemma does not dictate the end of growth or social justice. Overcoming this impasse requires recognizing that the ecological transition will not occur through spontaneous market forces; it demands a strategic state capable of coordinating public investment, industrial policy, income redistribution, and green financial regulation. By channeling aggregate demand toward low-carbon infrastructure and ensuring that productivity gains are equitably distributed, it becomes possible to align material prosperity with environmental preservation, transforming what previously seemed an insurmountable contradiction into the backbone of a new development project.
