Starting soon!

RCP8.5 controversy reminds me of 1979 SNL "Pepsi Syndrome" skit: Pres. Carter gets exposed to fallout at "2-Mile Island" Press Conference: Reporter 1: "Is it true the president is 100 feet tall?" Press Sec: "No! Absolutely not!" Reporter 2: "Is the President 90 feet tall?" Press Sec: "No Comment."

Sunday 5/24 at 10am PT on Climate Chat: Throwing Shade at Global Warming: Risks & Reality of Planetary Sunshades with Ross Centers. @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social #SRM #Climate #Geoengineering youtube.com/live/hlqBBRI...

Amazing and scary fact: Burning *one* gallon of gasoline emits CO2 into the atmosphere that traps the energy equivalent of one Hiroshima bomb (about 66 GJ) over its (very long) lifetime in the atmosphere! Really!

I never thought that President Trump would comment on a specific subject (RCP8.5) we covered on Climate Chat! See our interview with Detlef van Vuuren who wrote the key paper that removed RCP8.5 from the set of future emission scenarios. @leonsimons.com youtube.com/live/MYWokv0...

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Sunday 5/17 at 10am PT on Climate Chat: "The White House Scientist Scaling Climate Solutions" with President Biden's Climate Science Advisor Phil Duffy. @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social #ClimateCrisis #WhiteHouse #ClimateSolutions youtube.com/live/tTdOOVm...

One of the most important climate discussions: We can no longer meet +2ºC targets without massive amounts of carbon removal (CDR). Those that think CDR is a "moral hazard" are wrong. It's a moral hazard not to do CDR since that guarantees going over 2ºC! www.youtube.com/live/MYWokv0...

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Sunday 5/10 at 10am PT on Climate Chat: New Global Emissions Projections: Scrapping the Highs & Lows with climate scientist Detlef van Vuuren. Also on all audio podcast platforms (recorded) @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social #Climate #CO2 youtube.com/live/MYWokv0...

Starting soon! (10am Pacific Time)

Sunday 5/3 at 10am PT on Climate Chat: Biochar Carbon Removal: Finally Ready for Primetime? With Devonian Systems CEO Alan Ransil. #Biochar #CDR #Climate @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/iB8acFk...

"You may not be interested in climate change, but climate change is interested in you." - Tom Friedman

"It's has always concerned me that our use of the word 'conservative' has the opposite meaning in insurance to its meaning in climate science." - Trevor Maynard, Vice Chair and Director of Systemic Risk at the Cambridge Centre for Risk Studies.

“Ironically, one of the best proofs that information does not change people attitudes is that science communicators continue to ignore the extensive research evidence that shows that information does not change people’s attitudes.” - George Marshall

Starting soon!

Sunday at 10am PT on Climate Chat: Climate Blind Spots: Why SF Climate Week Worried Me with host Dan Miller. On YouTube & LinkedIn (live & recorded). Links in 🧵 @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social @climateweek.bsky.social youtube.com/live/Ht9_Vre...

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Sunday 4/19 at 10am PT on Climate Chat: Current Events: Are We Hitting the #AMOC Tipping Point? with AMOC Scientist René van Westen. On YouTube (live & recorded) & all podcast platforms (recorded). @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/JMtu9W4...

All Climate Chat episodes are now available as audio podcasts on Apple Podcasts (below), Spotify (in thread), etc.! @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social #Climate #Podcast podcasts.apple.com/us/podcast/c...

I had a great discussion today with Cornell's Doug MacMartin on Sunlight Reflection Methods (SRM). From how & when to do it, impacts, to the types of planes we can use. Long, but you will learn a lot about the technology we need to avoid catastrophe. youtube.com/live/Vm0vnMI...

Starting soon!

Sunday 4/12 at 10am PT on Climate Chat: Can We Reflect the Sun & Cool the Earth? with #SRM Scientist Doug MacMartin. #Geoengineering #ClimateChange @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/Vm0vnMI...

I gave a talk last week to the Healthy Planet Action Coalition (HPAC) on my 20-point climate action plan. Here is a recording of that talk. #ClimateAction youtu.be/OlKEiSzdJLQ?...

Starting soon!

Sunday 4/5 at 10am PT on Climate Chat: The Iran War Climate Paradox Explained with host Dan Miller. Why lower oil demand will not lower atmospheric CO2. @LeonSimons8 @drivingmzstacey @radsci youtube.com/live/YqumXgb...

It’s getting closer…

The % of renewables is irrelevant to climate change. Only the actual fossil fuel emissions count (not %). So it's great that solar is growing rapidly in Pakistan, but the question is how fast are fossil fuels dropping, if at all? bsky.app/profile/clim...

Starting soon!

Sunday 3/29 at 10am PT on Climate Chat: 3 Million Year Climate Secrets: What the Past Teaches Us, with hosts Dan Miller & @leonsimons.com #ClimateChange #GlobalWarming @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/4HIB2rL...

I'm happy to report that the final draft of my new book is in copy editing! The book is called When the Well is Dry: How Water Fuels Violence and Shapes Peace. It's about the history and trends of violence over freshwater and how to move from conflict to cooperation. bookshop.org/p/books/when...

Starting soon!

Sunday 3/22 at 10am PT on Climate Chat: Seaforestation Can Reverse Climate Change with Climate Foundation Founder Brian von Herzen. YouTube Link: youtube.com/live/ZxvUtBF... @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social #ClimateCrisis

Starting soon!

"The damage is neither unforeseen nor poorly understood; it is documented in real time. What impedes response is not ignorance, but the gravitational pull of convenience, entrenched power, and habitual patterns of consumption and governance." @kevinclimate.bsky.social, 03/02/2026 4/4

Sunday 3/15 at 10am PT on Climate Chat: Business Ethics & Climate Change w/ NYU Prof. & author Alison Taylor. #ClimateCrisis #Ethics @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/4c2YT_p...

Starting soon!

Sunday 3/8 at 10am PT on Climate Chat: 'Work on Climate' & Regenerative Economics with WoC CEO Eugene Kirpichov. @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social #ClimateAction #Regenerative youtube.com/live/2BWQYAe...

Yikes! Another brick-wall-graph.. Because of the methane released during production, liquification, transported, regasification, and the CO₂ released from burning, LNG is very bad for our climate. Fossil fuel wars are bad for people depending on fossil fuels.

Starting soon!

Sunday 3/1 at 10am PT on Climate Chat: Why We “Choose to Fail” on Climate Action with host Dan Miller. @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social #ClimateCrisis youtube.com/live/pYknyTI...

Starting soon!

Sunday 2/22 at 10am PT on Climate Chat: SRM Research: Science, Risk & Responsibility with Reflective.org CEO Dakota Gruener. #SRM #ClimateCrisis #GeoEngineering @leonsimons.com @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/V5gnRX6...

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Sunday 2/15 at 10am PT on Climate Chat: "+2C by 2030s?!" w/ hosts Dan Miller & @leonsimons.com. Includes discussion of @drjamesehansen.bsky.social recent communications. #ClimateCrisis #GlobalWarming @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/jcPwmfD...

Starting now!

Sunday 2/8 at 10am PT on Climate Chat: "Risks of Termination Shock" with climate scientist Francisco Estrada. Hosted by @leonsimons.com. #TerminationShock #SRM #ClimateCrisis @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/Q6XpRrm...

Starting soon!

Sunday 2/1 at 10am PT on Climate Chat "Can SRM Prevent Tipping Points?" with host Dan Miller. YouTube Link: youtube.com/live/hywUpOx... @LeonSimons8 @drivingmzstacey @radsci #SRM #tippingpoint #ClimateCrisis

Starting soon!