Lord Stern: Climate Action Costs Less Than Inaction

In a recent episode of Bloomberg's 'Zero' podcast, Lord Nicholas Stern, a distinguished economist and professor at the London School of Economics, revisited the core arguments of his seminal 2006 "Stern Review" on climate change economics. He emphasized that despite progress in renewable energy costs, global emissions have continued to rise, underscoring the urgency of sustained climate action. Stern discussed his latest work, "The Growth Story of the 21st Century," which broadens the definition of growth beyond traditional economic metrics like GDP to include well-being, health, education, and environmental quality.

redefining growth beyond GDP

Lord Stern articulated his view of growth as encompassing a comprehensive sense of well-being, including health, education, income, and the environment, with a focus on equitable distribution. He contrasted this with the traditional economic focus on Gross Domestic Product (GDP), acknowledging its origins in understanding how to improve living standards and employment post-Great Depression. However, Stern pointed out that GDP, while useful for measuring overall economic activity, fails to account for crucial societal factors like environmental quality, health, education, or income distribution.

The Enduring Relevance of the Stern Review

Stern's 2006 review famously concluded that the costs of inaction on climate change far outweigh the costs of action. He reiterated this point, noting that the costs of taking action have proven to be even lower than anticipated, particularly with the dramatic decrease in the cost of renewable energy and the superior performance of electric vehicles. He criticized economic models that underestimated climate risks and failed to incorporate rapid technological advancements.

The full discussion can be found on Bloomberg Podcast's YouTube channel.

Lessons from China and the Path Forward for India

Reflecting on China's development trajectory, Stern highlighted that while the nation achieved remarkable poverty reduction through rapid growth, the environmental consequences became a critical concern. He noted that China's shift towards green technology was partly driven by the lived experience of severe air pollution. He sees similar trends emerging in India, which is currently the fastest-growing major economy. Stern observed India's growing awareness of air pollution's impact and its investment in human capital and technological innovation as positive signs.

Critique of Nordhaus's Climate Models

Lord Stern addressed the work of Nobel laureate William Nordhaus, whose integrated assessment models suggested that a warming of 3-4°C might be optimal. Stern strongly disagreed, calling such a scenario "insanity" given its catastrophic potential consequences for human populations and the planet. He argued that Nordhaus's models fundamentally underestimated the problem and excluded key elements of the solution, such as the falling costs of clean energy and the importance of systemic changes in cities and transport.

The Power of Investment in Sustainable Infrastructure

Stern emphasized that investments in areas like renewable energy, improved grids, public transport, and better-functioning cities should not be viewed merely as costs. These are critical investments that yield substantial returns, not only in reduced emissions but also in improved health, efficiency, and overall quality of life. He cited examples like the Elizabeth Line in London and metro systems in India as clear instances where infrastructure investment translates into tangible benefits.

Navigating Political Dislocation and Managing Change

Acknowledging the political challenges in implementing climate action, Stern pointed to the UK's fractured consensus despite the economic benefits of the net-zero transition. He attributed this partly to the time lag in seeing benefits and the practical difficulties of managing change, such as adopting new technologies like electric vehicles or insulating homes. He stressed that good policy must involve open discussion, transparency about investments, and support for those affected by the transition.

The Role of Multilateral Development Banks and Global Opportunities

Discussing the role of international financial institutions, Stern highlighted that multilateral development banks, particularly those with less reliance on U.S. shareholding, can play a crucial role in lowering the cost of capital for developing countries. He noted that many emerging economies have the potential to leapfrog the dirtiest stages of development by investing in clean energy and new technologies. He sees a multipolar world emerging, driven by access to affordable, clean energy.

AI's Potential for Sustainable Growth

Stern expressed optimism about AI's role in driving sustainable growth, primarily through its application in optimizing complex systems like cities, land use, energy, and transport. He distinguished this from energy-intensive large language models, focusing instead on AI's capacity to improve the efficiency and management of critical infrastructure. He also addressed concerns about data center energy consumption, advocating for clean electricity supplies to power them.

Why Are We Still Waiting?

Concluding his remarks, Stern identified a combination of reasons for the slow pace of climate action, including high capital costs, the practicalities of managing change, and vested interests from the fossil fuel industry. He also pointed to the misleading narrative that net-zero policies increase the cost of living, which he deemed "dishonest" and scientifically ignorant. Stern stressed that net-zero is a scientific imperative for stabilizing the climate and that effective policy requires analytical clarity and a commitment to managing transitions equitably.

Lord Nicholas Stern's book, "The Growth Story of the 21st Century," is available for download via the link in the show notes.