How huge a deal is climate change, really? (with Diana Ürge-Vorsatz and Misha Glouberman)
Spencer Greenberg speaks with Diana Urge-Vorzatz (IPCC Vice Chair) and Misha Globerman about forecasting climate change's impact, the need for long-term compound risk research, and the accessibility of climate research to laypeople, navigating disagreements on quantitative risk assessment.
Deep Dive Analysis
14 Topic Outline
Introduction to Climate Change Severity and Public Perception
Misha's Layperson Investigation into Climate Risks
Diana's Expert Perspective and Role in IPCC
The Good Judgment Project and Superforecaster Climate Predictions
Critique of Forecasts and Indicators for Climate Impact
The Concept of Compound and Cascading Climate Risks
Challenges in Quantifying Long-Term Societal Climate Impacts
Debate on Trustworthiness of Forecasting vs. Expert Intuition
Impact of Climate Change on Human Livability and Civilization
The Role of Funding and Political Will in Climate Research
The Importance of Focusing on Climate Solutions and Benefits
Addressing Climate Anxiety and the Need for Realistic Assessments
The Inadequacy of Current Metrics for Measuring Quality of Life Impact
Geological History and Irreversible Climate Changes
5 Key Concepts
Superforecasters
Individuals or groups with a proven track record of accurately predicting future events, often by synthesizing diverse expert opinions and data. They are considered experts in predicting outcomes across various complex domains.
Compound Risks
The concept that climate change impacts do not occur in isolation but interact and amplify each other, leading to more severe and complex outcomes than single-event analyses suggest. For example, a heatwave combined with drought and failed rains can lead to widespread fires and supply chain disruptions.
Cascading Risks
A sequence of risks where one climate-related event triggers a series of subsequent, often unforeseen, impacts across natural and societal systems. These effects can lead to widespread disruption and suffering that are difficult to quantify with traditional metrics.
Climate Tipping Points
Critical thresholds in the Earth's climate system where a small additional change can lead to large, often irreversible, shifts in the system. Examples include the collapse of the Gulf Stream, melting of ice sheets, or die-off of major forests like the Amazon.
CO2 Fertilization
The process by which increased atmospheric carbon dioxide can enhance plant growth and crop yields. This effect is sometimes considered in climate forecasts but may not account for other limiting factors like water availability or extreme weather.
7 Questions Answered
Superforecasters synthesize information from various sources, including subject matter experts, to create probabilistic estimates for highly technical questions related to climate change scenarios, such as CO2 emissions, crop yields, and mortality rates under different warming levels.
Quantifying impacts is challenging because climate change involves complex interactions of natural and societal systems, leading to compound and cascading risks that are hard to model. Additionally, there is a lack of funding for research into extreme long-term climate scenarios and their societal implications.
Quantified concerns include the fact that atmospheric CO2 concentrations haven't been this high in 2 million years, and that 4.5 billion people could live in uninhabitable regions due to heat alone with 3-4 degrees Celsius warming, not accounting for other cascading effects.
Focusing solely on direct death figures from climate events like storms or heatwaves misses the broader picture of human suffering, quality of life degradation, economic losses, forced migration, and increased risks of pandemics and societal instability that are harder to quantify but profoundly impactful.
For the last 10,000 years, coinciding with the rise of human civilization, the global temperature has remained within a very stable band of about one degree Celsius, to which human societies and ecosystems are finely tuned.
Some experts argue that superforecaster predictions, especially for extreme warming scenarios like 7 degrees Celsius, may be fundamentally flawed because they might not fully account for the unprecedented and disruptive nature of such changes, including the collapse of entire ecosystems and the physical limits of human existence.
Solutions include transitioning to renewable energy for energy independence, adopting healthier plant-based diets, designing cities that reduce car reliance, and creating more durable products, all of which can lead to better health, less injustice, and a more compatible 21st-century society.
10 Actionable Insights
1. Focus on Implementing Known Solutions
Prioritize implementing existing climate solutions because they are known to create a better, healthier, and more just 21st-century compatible society and economy, regardless of the exact quantification of future risks.
2. Advocate for Extreme Climate Research
Publicize the need for more research funding into extreme climate scenarios, compound risks, and cascading effects, as current funding is insufficient and prevents a comprehensive understanding of potential impacts.
3. Critically Evaluate Climate Forecasts
Be skeptical of forecasts that extrapolate past trends or focus solely on single effects, as climate change involves fundamental disruptions and complex interactions of natural and societal systems not captured by simple models.
4. Adopt Solutions-Oriented Mindset
Shift focus from obsessively quantifying risks to actively pursuing solutions, viewing climate change as a critical situation (like a child with cancer) where all resources should be directed towards a positive outcome.
5. Diversify Diet for Health & Climate
Consider switching from red meat to white meat or plant-based foods. This small dietary change can significantly benefit both personal health and climate change mitigation efforts.
6. Promote Renewable Energy & Durability
Support and implement renewable energy sources to reduce reliance on fossil fuels and increase energy independence, and advocate for more durable products to reduce consumption and waste.
7. Seek Quantitative Risk Assessments
As a layperson, actively seek out quantitative risk assessments from diverse, proven sources (like super forecasters) to gain a clearer, albeit uncertain, understanding of potential outcomes and alleviate anxiety.
8. Consider Compound & Cascading Risks
When assessing climate change, recognize that impacts are rarely isolated; instead, consider how multiple events (e.g., heat, drought, fires) can combine and cascade, leading to far greater societal disruption than single-factor analyses suggest.
9. Broaden Impact Metrics Beyond Deaths
Understand that direct death tolls are insufficient metrics for climate change’s true impact. Instead, consider broader measures of human suffering, quality of life, loss of cultural heritage, and societal stability (e.g., migration, pandemics).
10. Be Mindful of Information Sources
Recognize that vested interests (e.g., fossil fuel industries) actively obscure climate knowledge, making it difficult for laypeople to find accurate information. Be critical of sources and their potential biases.
5 Key Quotes
The future depends on us and what we do. And when we forecast something, then people accept that that's the way it's going to be, and then people are going to go that way.
Diana Ürge-Vorsatz
I'm not an expert on climate change at all. But I am an expert in how people talk about difficult and contentious issues.
Misha Glouberman
I do sincerely believe that it is the biggest problem facing humanity right now. I do hope we will solve it, but right now we don't look like one.
Diana Ürge-Vorsatz
We are playing a huge global planetary experiment and societal experiment.
Diana Ürge-Vorsatz
The problem is that the vast majority of such forecasts works with extrapolation of previous trends and looking at what happened in the past and trying to see how what we learn from that and how that will then pan out for the future. But what my point is, that climate change is so disruptive and it puts us into situations which we have never experienced before.
Diana Ürge-Vorsatz