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Topic: Global Warming

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[Episode #208] – Vernacular Architecture

Oct 4 2023

Mini Episode

Can ancient architectural and building techniques help us create comfortable spaces without consuming energy in today's world?

Our guest in this episode thinks so.

Dr. Sandra Piesik is an award-winning architect, author, and scientist with extensive experience in what is now called “vernacular architecture.” Among many other things, she specializes in agitating for legislation supporting sustainability and nature-based solutions to the climate challenge.

She has published two books on vernacular architecture, including Habitat—Vernacular Architecture for a Changing Climate, published in May of this year. In it, she curates the work of an international team of more than one hundred experts across a diverse range of disciplines, who examine what the traditions of vernacular architecture and its regional craftspeople around the world can teach us about creating a more sustainable future. With over 1000 illustrations, the book reveals how people and cultures have used indigenous materials and construction techniques in all five of the planet’s climate zones to create comfortable built environments, and it stresses the importance of preserving disappearing craftsmanship and local knowledge before it is lost forever.

In today’s conversation, we discuss what ‘vernacular architecture’ is, what some of the specific techniques are, how those techniques could be used today, and what’s preventing us from using them. We also discuss the role of vernacular architecture within the broader context of sustainable development, and what a holistic approach to the UN’s Sustainable Development Goals might look like.

Geek rating: 1

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[Episode #203] – The Case for Climate Optimism

Jul 26 2023

Mini Episode

Why does so much media coverage of climate change emphasize the worst-case scenarios and the slow speed of the energy transition? Why don't more stories highlight how the energy transition is working and accelerating, reducing expected increases in carbon emissions and rendering the worst-case warming scenarios increasingly unlikely?

These are important questions, because reporting about the climate and the energy transition can be a self-fulfilling prophecy. If the media constantly asserts that climate change is unstoppable and that we’re doomed, people will feel discouraged and give up during a critical time in which we must make progress. Whereas by showing people how they can be part of the solution, they will do what they can and support leaders committed to addressing the problem.

It’s also important that we understand what’s real and likely, and what isn’t. An unfortunate number of stories about climate change have emphasized vague “tipping points” and “feedback loops” that might accelerate warming in the future. But those are unquantified and undefined terms referring to highly uncertain possibilities. Meanwhile, highly probable outcomes that would result from existing climate policies are barely mentioned.

So why is there so much media focus on the worst-case scenarios? A shred of uncertainty isn't a sufficient reason to emphasize the worst case above all else. Wouldn't it make more sense to focus on the likely outcomes of our existing policies?

In this episode, we're joined by a climate researcher and data analyst who finds reason for optimism on climate change. Hannah Ritchie is a Senior Researcher in the Programme for Global Development at the University of Oxford. She is also Deputy Editor and Lead Researcher at the online publication Our World in Data, which brings together the latest data and research on the world's largest problems and makes it accessible for a general audience. Her forthcoming book, Not the End of the World, will be published in January 2024.

In today’s conversation, Hannah explains what converted her from a climate pessimist to an optimist, and shares her insights into why stories of climate doom seem to be more popular. We explore a number of her data analyses that support her optimistic outlook. And we discuss why it’s important to give people hope that we can address the climate challenge successfully—not by merely adopting a pollyannish attitude, but by really looking at the facts, and understanding the progress that we’re actually making.

Geek rating: 5

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[Episode #176] – Climate Scenarios vs. Reality

Jul 6 2022

Mini Episode

Why do so many decarbonization scenarios rely on carbon capture and sequestration (CCS) to play a major role in the world's energy transition portfolio when it really doesn’t even exist as a commercial technology? Why does the IPCC's climate mitigation strategy model countries as if they would implement the same policy for carbon pricing across all sectors, when we know that’s just not how the world operates? Why do models dodge attempts to reflect the fragmented, irrational, and irregular way that the world actually works, when we know for a fact that the transition is going to be a bumpy ride into a hazy future?

If globally coordinated carbon pricing never materializes, and CCS never has a real market opportunity as our integrated assessment models assume, where will that leave us in developing meaningful policies and taking action on climate change? And why aren’t other people asking this vital question?

In this episode, Dr. Ida Sognnaes, a Senior Researcher at the CICERO Center for International Climate Research, explains how the integrated assessment models (IAMs) used in IPCC reports are constructed, what assumptions modelers make, and how the very design of IAMs can bias them toward certain outcomes—including the role of CCS as a climate mitigation strategy. She also offers further evidence that the world is currently on a trajectory for between 2 and 3 degrees of warming by the end of the century, and shares her perspective on why the climate modeling community has been so reluctant to just say that plainly.

Geek rating: 8

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[Episode #112] – Climate Science Part 11 – Climate Confusion

Jan 8 2020

Mini Episode

What do the various emissions scenarios published by the IPCC really mean? Is the worst-case RCP8.5 scenario “bollox,” as some have asserted, or it useful? Are we already doomed to experience seven feet of sea level rise and five degrees Celsius of warming globally, or is there still a chance that we can limit warming to two degrees? And if so…how likely is it that we can hit that target? How much can our energy transition efforts, both now and in the foreseeable future, do to mitigate that warming? Should our scenarios err on the side of being too extreme to account for unknown feedback effects and tipping points that may come in the future, or should we try to be as accurate as possible with our modeling, given the available data and scientific tools?

In this 11th part of our miniseries on climate science, we attempt to answer these questions and help our listeners sort out the various perspectives, from the tame to the apocalyptic, that feature in the current debates about our climate future. We hope that it will leave you with a much better understanding of what the climate scenarios really mean, how likely they are, and what the actual trajectory of climate change might be. We’re not out of the woods by any means, but our prospects may be better than you think!

View all parts of The Energy Transition Show mini-series on climate at: https://energytransitionshow.com/climatescience

Geek rating: 9

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[Episode #74] – Climate Science Part 10: How to limit warming to 1.5°C without CCS

Jul 25 2018

Mini Episode

In this tenth part of our series on climate science, we explore a new paper outlining a climate scenario that would limit warming to 1.5 °C without relying on negative emission technologies. It does so by detailing numerous pathways that could lead the world toward much lower total primary energy consumption, including a heavy focus on the demand side, quantifying the impact of behavioral changes and different ways of providing energy services, rather than simply focusing on consuming energy.

This doesn’t mean that actually following the pathways outlined in this model will be easy, or that staying under 1.5 degrees of warming is going to happen automatically. In fact, some of the behavioral changes that would be needed might be as difficult as implementing a carbon tax (or, for that matter, implementing CCS at scale). But this outlook does respond to our main complaints with the existing body of climate and energy scenarios—that they generally depend on negative emissions technologies like CCS, and that they don’t adequately take into account measures and policies that are already reducing our energy demand and accelerating the energy transition. Our guest in this episode is one of the co-authors of the paper: Charlie Wilson, a researcher at the Tyndall Centre for Climate Change Research, and an Associate Professor in Energy & Climate Change at the University of East Anglia in the UK. His expertise on consumer adoption of technology, behavior and policy as they relate to energy and climate change mitigation gives him a unique perspective on this research that we think you’ll find illuminating and thought-provoking.

Geek rating: 5

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[Episode #40] – Climate Science Part 2 – Taking Planetary Temperatures

Apr 5 2017

Mini Episode

In this second episode of our mini-series on climate science, we begin to dive a bit deeper on narrower subjects, starting with a look at how we take the Earth’s temperature, on land, on the sea surface, and deeper in the ocean depths. Along the way, we discuss temperature measurements at the heart of the “Climategate” nothingburger, the 2013 “Pausebuster” paper proving the supposed “pause” or “hiatus” in global warming trends didn’t actually happen, and a recent kerfuffle over that paper. We also find out if the melting of permafrost and undersea methane clathrates could lead the planet into runaway global warming, and discuss some research on the net emissions effect of switching from coal to gas in power generation, including the thorny issue of fugitive emissions from natural gas production and distribution. And finally, we’ll take another look at the question of decoupling economic growth from energy consumption, and how emissions are counted in the first place. After listening to this interview, you’ll be well-equipped to listen critically to both the latest scientific findings on global temperatures, and to the arguments of global warming skeptics. Plus, we’ll talk about the implications of Trump’s proposed budget, which would gut the very agencies that deliver these crucial scientific measurements.

Geek rating: 6

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[Episode #36] – Climate Science Part 1 – Climate Change Overview

Feb 8 2017

Mini Episode

With President Trump fully embracing fossil fuels and indicating that he intends to abandon US efforts to address climate change (and even the scientific inquiry underlying those efforts), there is no time like the present to refresh what we know about climate change, what we can do about it, and what kinds of research still need to be done to improve our understanding. This episode is the first of what will become a mini-series of episodes on the science of climate change, and it starts by looking at the debate over climate change, the counter-arguments of climate change skeptics and the rebuttals to those arguments, and what recent scientific observations can tell us. It also suggests that ultimately, there may be a lot more willingness amongst the rank and file of all political parties to take action on climate, regardless of ideological perspectives on the left and right.

Geek rating: 5

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