Verra recently announced that more than half of the credits from the Kariba REDD+ project don’t represent real climate benefits. Our new commentary explains why carbon market participants should treat Verra’s proposed solution to excess crediting with skepticism.

This book is so good

I wrote about how Earth's wobble causes our view of the skies to shift over time. Here's a paywall-free gift link. With @fparis.bsky.social and @iamrumz.bsky.social

Nearly 6 billion people live in the 101 countries that a recent study has identified as confronting a net decline in water supply — signaling enormous challenges for food production and a heightening risk of conflict and instability. By @abrahm.bsky.social, w/ graphics by @lucaswaldron.bsky.social

California’s offset program is not only deeply flawed, it also costs the state hundreds of millions of dollars in annual revenue. We dive into the details in a new commentary. carbonplan.org/research/off... (1/7)

An abandoned project from last year. I planned on a "Landforms of #Madison" map, but got stuck at the labeling stage because almost none of these features have names I could find. Maybe a 15–20 across the whole map. The state capitol sits on a big unnamed hill. This has downstream effects… (1/2)

🆕 #CNG2025 session recording Raphael Hagen & @shaneloeffler.com from @carbonplan.org share how they went about visualizing GeoParquet data directly in the web browser. ▶️ youtu.be/SsjNPFv5dgI

How did I not know about this???? It works amazingly well - select 'transactions' and then just whack in a company name. Massively under-used resource here

We spent an entire paddling season researching and paddling across the Twin Cities to create this guide. The Star Tribune has never put out a guide this comprehensive. Get out on the water, people. It's really the best thing you can do this summer. www.startribune.com/canoe-kayak-...

Effective immediately, the PGC is no longer accepting new NSF-supported requests due to a lack of renewal funding. Current work is wrapping up. Please contact your NSF program officer if impacted. We’re grateful to have supported your polar research. Read our full statement at www.pgc.umn.edu

Raphael and Shane @carbonplan.org on visualizing GeoParguet in the browser, along with some nerdy details like partitioning and spatial indexing @cloudnativegeo.org #cngconference

Last week I was playing around with a new "tree ring plot" to visualize daily global temperature anomalies from ERA5. I thought it would be neat to make a version of the plot for daily global absolute temperatures (rather than anomalies):

Want to know how fossil fuel companies use carbon offsets to claim they’re fighting climate change? We've updated OffsetsDB — our offsets database — to allow you to search by carbon credit user. Search "Shell" and see what offsets they're using and when. (1/4) carbonplan.org/research/off...

The Alliance of Freelance Cartographers needs your help! By taking our short annual survey, you strengthen your #cartography community. This survey is for anyone (globally) who did any amount of freelance mapping last year (even a little). forms.gle/VaZqPpxeB8Qu... Please help spread this widely!

My latest is on the quiet good news of having free "Royale" access to the Transit App. www.minnpost.com/cityscape/20...

When my house and community burned - where was the satellite information? A very raw blog post I am putting up so folks in the satellite, geospatial and tech fields can listen firsthand why I think we are failing the situations that need us the most. www.linkedin.com/pulse/when-o...

🌍✨ What if your computing jobs could chase the sun and the wind, reducing your carbon footprint as they go? 1/8

Last year, Bde Maka Ska was ice-free 26 days earlier than usual when I was a kid. My latest: www.startribune.com/how-does-202...

There is a handy tool that @davidho.bsky.social helped build to see just that. TLDR is that it’s pretty fast in most places, but there are some bad spots one could do it: carbonplan.org/research/oae...

Let me tell you a story – one of the more haunting I’ve seen in 20 years of journalism. It’s about greed, death and denial. It took two years to unravel one doctor’s myth, a hospital’s complicity in creating it, and a documented trail of suspicious deaths…🧵

NEW: “Eat What You Kill” Hailed as a savior upon his arrival in Helena, Dr. Thomas C. Weiner became a favorite of patients and his hospital’s highest earner. As the myth surrounding the high-profile oncologist grew, so did the trail of patient harm and suspicious deaths. @davidmcswane.bsky.social

I missed the #30DayMapChallenge, but wanted to share something I worked on during those 30 days for a story in my friend's zine about a backpacking trip I did several years back in the Rincon Mountains of southern Arizona.

To make all of this even worse: ethanol CCS is being falsely sold as a carbon removal offset. This @carbonplan.org post is a fantastic, readable breakdown of why ethanol CCS simply avoids extra carbon being released - rather than sucking carbon from the air. carbonplan.org/research/eth...

An animated hachure #terrain doodle I made last night/today, varying the line density parameter in my script across 30 frames.

Projects that aim to remove carbon by tweaking existing industrial processes can end up avoiding some emissions as well. That’s a good thing for the climate — but it can pose challenges when trying to support these projects through the sale of carbon removal credits. carbonplan.org/research/cdr... 🧪

I had a lot of fun working on this tool!