Decarbonizing the Global Economy: Carbon Pricing, Technological Innovation, and Climate Accountability

This podcast episode, originally titled \"In the Long Run Are We All Dead: Climate Change and Denial\" but reframed as \"Achieving a Low-Carbon Economy: Challenges, Technological Progress, and Responsibilities,\" delves into the multifaceted challenge of climate change and the pathways to a low-carbon future. Adair Turner, chairman of the Energy Transitions Commission, sets the stage by outlining the critical carbon budget – approximately 900 Giga tons of carbon remaining for the energy system over the next 85 years to stay below a 2-degree Celsius temperature increase. He highlights the alarming rate of current emissions (40-42 GtC/year), which would exhaust the budget in about 25 years, necessitating a drastic reduction to zero by 2060. The core strategies proposed by the Energy Transitions Commission include decarbonizing electricity production, electrifying as much of the economy as possible, decarbonizing hard-to-electrify sectors, and radically improving energy efficiency.\n\nJim Boyce, Professor of Economics at the University of Massachusetts Amherst, critically examines the role of carbon pricing. He argues that economists should focus on the *means* to achieve climate targets rather than prescribing the *ends*, which he believes should be determined by climate science and international consensus (1.5-2°C). Boyce critiques prominent integrated assessment models, such as Nordhaus's DICE model, for suggesting "optimal" carbon prices that lead to temperature increases (e.g., 3.5°C) far exceeding safety thresholds, labeling this approach as \"climate change denial light.\" He emphasizes the distinction between efficiency (the neoclassical economic criterion) and safety (the basis for much environmental policy, like the Clean Air Act) as normative goals, advocating for safety as the primary driver for climate policy.\n\nThe discussion also covers the remarkable progress in renewable energy, with the cost of wind and solar PV electricity plummeting by 65% and 85% respectively between 2009 and 2015, and battery storage costs following a similar dramatic downward trend. This success is attributed to conscious public policy, including initial subsidies and R&D support, which induced private sector investment, scaled technologies, and drove down costs. For hard-to-abate sectors like aviation, steel, and cement, the podcast suggests replicating this model with public R&D and early deployment subsidies for technologies such as hydrogen or carbon capture and storage (CCS). A critical implication is the urgent need to cut coal use, particularly thermal coal, by 90% in advanced economies immediately, while gas growth must halt and oil use must decrease by about 30% by 2040.\n\nFinally, the podcast addresses the practical implementation and broader implications of carbon pricing. While carbon pricing is seen as a cost-effective instrument for emissions reductions and a driver of technological change, it must be part of a broader policy mix that includes conventional regulations and public investment. This is crucial for addressing co-pollutants, preventing pollution hotspots, and mitigating the significant and regressive impact of carbon prices on household purchasing power. The revenue generated from carbon pricing, described as a "scarcity rent," presents an opportunity for redistribution, such as through carbon dividends, to address equity concerns and ensure political feasibility. The overall message underscores the necessity of integrated action between government and the private sector, guided by scientifically determined safety targets, to navigate the immense scale of the energy transition.

"in the long run are we all dead climate change and denial"

"achieving a low-carbon economy challenges technological progress and responsibilities"

"we better limit our energy system emissions to something like 900 Giga tons of carbon to give you an idea at the moment the energy system in terms of the energy we consume as part of our economies is putting out something sort of 40 42 Giga tons per annum so clearly if we keep doing that we're gonna run out of road in about 25 years time"

"the cost of renewable energy is collapsing"

"I hope people have destroyed the evidence of our analysis at that time because we completely useless at working out how fast these costs are we going to come down"

"this is actually one of the most successful examples of an integrative action between government and the private sector governments taking action that then unleash the al activity activity of the private sector that we've seen"

"economists have much to contribute in discussing the means to address the climate change problem but that we ought not to irrigate unto ourselves the power to determine what the ends should be"

"the numbers that the SCC or social cost of carbon folks are putting out there I would say are so low the numbers come in from the dice model and the other mainstream models that I think they could be called climate change denial light"

"it's time to abandon I think the pretense that the market should define our directions in all things"

"the simple point about thermal coal use coal use for electricity in the advanced economies is it's really got to stop tomorrow if we are in the least bit serious about the Paris climate commitments"

"the fact that carbon pricing on its own it has both a big impact and a regressive impact has very important political implications and ethical implications"