Sanity Check

The concept of “planetary boundaries” has become one of the most influential frameworks in modern environmental science—shaping global policy, corporate behavior, and public perception. But how solid is it, really? 
In this episode of Sanity Check, Dr. David R. Legates examines the origins of the planetary boundaries model and walks through each of its ten proposed limits—from climate change and biodiversity loss to ocean chemistry and chemical pollution. Along the way, he raises critical questions about the scientific ambiguity behind so-called “tipping points,” the arbitrariness of defined thresholds, and the growing tendency to treat uncertain models as settled fact. 
Are we truly approaching environmental collapse—or are we being guided by a framework that overstates risk and underestimates resilience? 
This episode challenges one of the dominant narratives in environmental discourse and asks whether these “guardrails” are grounded in reality—or constructed to drive a predetermined conclusion.
Links: 
https://www.science.org/doi/10.1126/sciadv.adh2458
https://www.popularmechanics.com/science/environment/a45124009/humanity-oversteps-planetary-boundaries/
https://www.popularmechanics.com/science/environment/a70381572/aquatic-deoxygenation-planetary-boundaries-climate-crisis/

Visit our podcast resource page: https://cornwallalliance.org/listen%20to%20our%20podcast%20created%20to%20reign/

Our work is entirely supported by donations from people like you. If you benefit from our work and would like to partner with us, please visit www.cornwallalliance.org/donate.

What happens when lawsuits quietly shape public policy—without a full trial, public scrutiny, or legislative debate? In this episode of Sanity Check, David R. Legates unpacks the controversial practice known as “sue-and-settle.”
What begins as a seemingly straightforward legal mechanism—citizens holding agencies accountable—can, in practice, become something far more complex. Through negotiated settlements between advocacy groups and federal agencies like the Environmental Protection Agency, binding regulations can emerge behind closed doors, often bypassing the traditional rulemaking process and limiting public input.
This episode walks through how sue-and-settle works, why it’s been used under laws like the Clean Air Act, and where the real controversy lies: accountability, transparency, and the balance of power in a democratic system. With millions in taxpayer-funded legal fees and far-reaching regulatory consequences at stake, critics argue this approach amounts to “regulation through litigation.”
Is sue-and-settle an efficient tool for enforcing the law—or a loophole that sidelines the public and reshapes policy without consent?
Tune in for a clear-eyed breakdown of one of the most debated—and least understood—mechanisms in modern environmental governance.
https://openthebooks.substack.com/p/trump-epa-ends-exorbitant-pay-outs
https://www.uschamber.com/regulations/sue-and-settle-regulating-behind-closed-doors
https://virginialawreview.org/wp-content/uploads/2020/12/Tyson_Book.pdf
https://www.heritage.org/environment/commentary/environmentalists-sue-settle-and-apologize-later

Visit our podcast resource page: https://cornwallalliance.org/listen%20to%20our%20podcast%20created%20to%20reign/

Our work is entirely supported by donations from people like you. If you benefit from our work and would like to partner with us, please visit www.cornwallalliance.org/donate.

How reliable are the measurements behind climate claims? In this episode of Sanity Check, David R. Legates examines the data systems used to estimate Earth’s energy imbalance—particularly ocean temperature measurements from Argo floats. While widely treated as authoritative, these measurements rely on sparse sampling, interpolation, and assumptions that introduce significant uncertainty.
The result: the margin of error may exceed the signal itself, raising serious questions about the precision of current climate estimates and the confidence placed in them. 
https://www.aoml.noaa.gov/argo/
https://zenodo.org/records/18936064
https://zenodo.org/records/18943232

Visit our podcast resource page: https://cornwallalliance.org/listen%20to%20our%20podcast%20created%20to%20reign/

Our work is entirely supported by donations from people like you. If you benefit from our work and would like to partner with us, please visit www.cornwallalliance.org/donate.

In this episode of Sanity Check, David R. Legates explores the rise of “greenhushing”—a growing corporate trend where companies pursue environmental initiatives but deliberately stay silent about them.
Contrasting it with the more familiar concept of greenwashing, this episode examines why major companies like Apple, HSBC, Nestlé, and Nike are pulling back from public climate messaging, even as many continue sustainability efforts behind the scenes. From regulatory pressure and legal risk to activist backlash and shifting political winds, “going green, then going dark” reflects a deeper tension between perception, policy, and profit.
Drawing on recent data and real-world examples—including the fallout faced by Bud Light—this episode unpacks how fear, incentives, and public scrutiny are reshaping corporate behavior in the climate space.
At its core, this conversation asks a larger question: in a world where messaging often matters more than substance, what happens when companies decide silence is the safest strategy?
https://www.southpole.com/publications/south-pole-net-zero-report-2025

https://sloanreview.mit.edu/article/the-greenhushing-trap

https://hbr.org/2025/09/are-companies-actually-scaling-back-their-climate-commitments

https://www.talkingclimate.ca/p/climate-hushingthe-quiet-trend-undermining

Visit our podcast resource page: https://cornwallalliance.org/listen%20to%20our%20podcast%20created%20to%20reign/

Our work is entirely supported by donations from people like you. If you benefit from our work and would like to partner with us, please visit www.cornwallalliance.org/donate.

Are rising insurance costs really driven by climate change—or is that just the latest political narrative?
In this episode, Dr. David Legates takes apart the claim that extreme weather is driving a home insurance crisis. From hurricanes and droughts to wildfires in Maui and Los Angeles, he examines the data—and the stories behind the headlines.
The real drivers? Land-use changes, population growth, and poor policy decisions—not a surge in climate disasters.
This episode also explores how media narratives, rapid-response “attribution science,” and political incentives shape public perception before the facts are fully known.
If you’ve heard that “climate change is making everything worse,” this is a clear-eyed look at what the evidence actually shows—and what it doesn’t.
https://www.bbc.com/news/articles/cd9qy4knd8wo
https://rogerpielkejr.substack.com/p/disasters-cost-more-than-ever-but
https://abc30.com/post/broken-power-lines-caused-deadly-maui-wildfire-new-report-shows/15388308/
https://www.independent.org/article/2026/01/07/the-2025-los-angeles-wildfires-lessons-and-key-recommendations/

Visit our podcast resource page: https://cornwallalliance.org/listen%20to%20our%20podcast%20created%20to%20reign/

Our work is entirely supported by donations from people like you. If you benefit from our work and would like to partner with us, please visit www.cornwallalliance.org/donate.