Delger Erdenesanaa
@edelger.bsky.social
Journalist | covering food, agriculture, water, pesticides and PFAS policy @cenmag.bsky.social | formerly at The New York Times, Texas Observer and Inside Climate News | Signal: edelger.10
Read my work: www.delgererdenesanaa.com
Read my work: www.delgererdenesanaa.com
Pinned
Delger Erdenesanaa
@edelger.bsky.social
· Sep 30
New job, new beat: I'm now covering PFAS, pesticides and other chemicals in food, ag and water for @cenmag.bsky.social. Would love to connect with sources -- please do reach out with tips (or just intros)!
My new email is D_Erdenesanaa at acs dot org. Signal remains edelger dot 10.
My new email is D_Erdenesanaa at acs dot org. Signal remains edelger dot 10.
Reposted by Delger Erdenesanaa
Nov. 14 Policy Watch: US government reopens, is absent from COP 30 climate conference
In other news, the EPA wants to trim PFAS reporting requirements and is pushing back compliance dates for parts of its TCE and methylene chloride rules. cen.acs.org/policy/Nov-1...
In other news, the EPA wants to trim PFAS reporting requirements and is pushing back compliance dates for parts of its TCE and methylene chloride rules. cen.acs.org/policy/Nov-1...
Nov. 14 Policy Watch: US government reopens, is absent from COP 30 climate conference
In other news, the EPA wants to trim PFAS reporting requirements and is pushing back compliance dates for parts of its TCE and methylene chloride rules
cen.acs.org
November 15, 2025 at 11:06 AM
Nov. 14 Policy Watch: US government reopens, is absent from COP 30 climate conference
In other news, the EPA wants to trim PFAS reporting requirements and is pushing back compliance dates for parts of its TCE and methylene chloride rules. cen.acs.org/policy/Nov-1...
In other news, the EPA wants to trim PFAS reporting requirements and is pushing back compliance dates for parts of its TCE and methylene chloride rules. cen.acs.org/policy/Nov-1...
Tomorrow at #COP30 I'll be discussing what I learned from my recent @pulitzercenter.org reporting on marine heatwaves and their effects on wildlife and fisheries -- 1:30pm Brazil time at the Ocean Pavilion, alongside fishermen & women, scientists, and policymakers.
🎣 How can fisheries adapt to a changing climate? Scripps PhD candidate Max Titcomb joins this #OceanPavilion panel to discuss the impacts of overfishing and marine heatwaves, as well as solutions to build climate-resilient fisheries. #COP30
📆 Nov 15
🔗 https://bit.ly/4nLxq3i
📆 Nov 15
🔗 https://bit.ly/4nLxq3i
November 14, 2025 at 5:10 PM
Tomorrow at #COP30 I'll be discussing what I learned from my recent @pulitzercenter.org reporting on marine heatwaves and their effects on wildlife and fisheries -- 1:30pm Brazil time at the Ocean Pavilion, alongside fishermen & women, scientists, and policymakers.
Rescheduled for this morning 8 am - if you are in the Blue Zone, come by the Ocean Pavilion and learn about the links between rainforest and ocean to start your day.
The Amazon and the ocean are deeply connected, yet this link is underreported.
Join us this afternoon, for a conversation that brings together journalists, researchers, and educators exploring how these ecosystems shape our future.
Register now!
👉 bit.ly/30COPsesh
Join us this afternoon, for a conversation that brings together journalists, researchers, and educators exploring how these ecosystems shape our future.
Register now!
👉 bit.ly/30COPsesh
November 14, 2025 at 10:55 AM
Rescheduled for this morning 8 am - if you are in the Blue Zone, come by the Ocean Pavilion and learn about the links between rainforest and ocean to start your day.
The best news from #COP30 so far is that a couple got engaged last night during dinner at a restaurant just outside the venue. It was packed with conference attendees and decidedly not the most romantic ambiance… but good for them!!
November 12, 2025 at 1:44 PM
The best news from #COP30 so far is that a couple got engaged last night during dinner at a restaurant just outside the venue. It was packed with conference attendees and decidedly not the most romantic ambiance… but good for them!!
I’m in Belém covering #COP30. It’s a difficult geopolitical—and physical—context, as the planet begins to breach the 1.5C goal set 10 years ago and the US withdraws once again from the Paris Agreement. I’ll be continuing coverage throughout the conference, so please reach out if you’d like to talk.
Diplomats from nearly 200 countries, as well as tens of thousands of observers, are gathering in Belém, Brazil, from Nov. 10 to 21 for the annual United Nations climate summit. cen.acs.org/policy/COP30... #chemsky 🧪
As COP30 begins, countries face ‘hard truth’ of 1.5 °C global warming
The average global surface temperature passed a key threshold last year. Meanwhile, the US does not have an official delegation at the UN climate conference now underway in Brazil
cen.acs.org
November 10, 2025 at 7:45 PM
I’m in Belém covering #COP30. It’s a difficult geopolitical—and physical—context, as the planet begins to breach the 1.5C goal set 10 years ago and the US withdraws once again from the Paris Agreement. I’ll be continuing coverage throughout the conference, so please reach out if you’d like to talk.
Reposted by Delger Erdenesanaa
Not since 1935 has anyone experienced a storm like Melissa. Melissa's record wouldn't have happened without climate change, which made the hurricane's winds about 10 mph stronger, according to a rapid attribution analysis by Climate Central. yaleclimateconnections.org/2025/10/cata...
Catastrophic Hurricane Melissa hits Jamaica as the strongest landfalling Atlantic hurricane on record » Yale Climate Connections
At landfall in western Jamaica, Melissa’s 185 mph winds and 892 mb pressure tied with the Labor Day Hurricane of 1935 in the Florida Keys as the strongest on record for the Atlantic.
yaleclimateconnections.org
October 28, 2025 at 6:53 PM
Not since 1935 has anyone experienced a storm like Melissa. Melissa's record wouldn't have happened without climate change, which made the hurricane's winds about 10 mph stronger, according to a rapid attribution analysis by Climate Central. yaleclimateconnections.org/2025/10/cata...
Reposted by Delger Erdenesanaa
A team of international scientists suggests that ignoring plankton could lead scientists to underestimate how the ocean will respond to climate change. Read more: cen.acs.org/environment/...
#CENChemPics #chemsky 🧪
#CENChemPics #chemsky 🧪
October 28, 2025 at 4:00 PM
A team of international scientists suggests that ignoring plankton could lead scientists to underestimate how the ocean will respond to climate change. Read more: cen.acs.org/environment/...
#CENChemPics #chemsky 🧪
#CENChemPics #chemsky 🧪
Yes, there's lead in protein powders. No, there's no known safe level. But, exposure to trace amounts is inevitable, especially since plants naturally take up lead from the environment. And, people disagree on standards for manufacturers. Latest @cenmag.bsky.social: cen.acs.org/food/food-in...
Why scientists found lead in protein powders
Consumers shouldn't panic
cen.acs.org
October 27, 2025 at 8:22 PM
Yes, there's lead in protein powders. No, there's no known safe level. But, exposure to trace amounts is inevitable, especially since plants naturally take up lead from the environment. And, people disagree on standards for manufacturers. Latest @cenmag.bsky.social: cen.acs.org/food/food-in...
Reposted by Delger Erdenesanaa
It's been a big year for chemists trying to turn PTFE (better know as Teflon) into something that won't hang out in a landfill for 1,000 years. The latest development in this area uses chunks of sodium metal. My latest for @cenmag.bsky.social
cen.acs.org/materials/po...
cen.acs.org/materials/po...
This reaction turns Teflon into toothpaste’s key ingredient
Grinding PTFE with chunks of sodium metal creates sodium fluoride in a solvent-free reaction that aims to avoid landfills
cen.acs.org
October 27, 2025 at 7:46 PM
It's been a big year for chemists trying to turn PTFE (better know as Teflon) into something that won't hang out in a landfill for 1,000 years. The latest development in this area uses chunks of sodium metal. My latest for @cenmag.bsky.social
cen.acs.org/materials/po...
cen.acs.org/materials/po...
Our first weekly briefing of chemistry policy news @cenmag.bsky.social. In food world, companies and trade groups formed a supergroup called Americans for Ingredient Transparency to lobby Congress to preempt state laws on food additives and other MAHA-inspired issues: cen.acs.org/policy/Oct-2...
Oct. 24 Policy Watch: Schools reject White House ‘compact’
In other news, EPA launches a new research office and NGOs sue the Trump administration over air pollution exemptions
cen.acs.org
October 24, 2025 at 6:03 PM
Our first weekly briefing of chemistry policy news @cenmag.bsky.social. In food world, companies and trade groups formed a supergroup called Americans for Ingredient Transparency to lobby Congress to preempt state laws on food additives and other MAHA-inspired issues: cen.acs.org/policy/Oct-2...
Reposted by Delger Erdenesanaa
A 2023 marine heat wave in the central Red Sea caused 100% of monitored sea anemones to bleach, followed by the death of 94-100% of clownfish and 66-94% of the anemones across three surveyed reefs.
The findings challenge the belief that Red Sea marine life would be protected from climate change.
The findings challenge the belief that Red Sea marine life would be protected from climate change.
Losing Nemo: In the Red Sea, clownfish vanish as anemones bleach
When Morgan Bennett-Smith descended to a familiar reef in the central Red Sea in September 2023, he expected to find the same tagged anemones and resident clownfish he had been monitoring for months.…
news.mongabay.com
October 16, 2025 at 4:14 PM
A 2023 marine heat wave in the central Red Sea caused 100% of monitored sea anemones to bleach, followed by the death of 94-100% of clownfish and 66-94% of the anemones across three surveyed reefs.
The findings challenge the belief that Red Sea marine life would be protected from climate change.
The findings challenge the belief that Red Sea marine life would be protected from climate change.
New Mexico is proposing warning labels for #PFAS across a wide range of consumer products starting next year, similar to California's Prop 65 labels. This is part of the rule-making for a new law that also phases out many products with PFAS. More in @cenmag.bsky.social: cen.acs.org/policy/New-M...
New Mexico proposes world’s broadest use of PFAS warning labels
The state’s proposed requirements have not been done anywhere else and stem from a 2025 law that also outlaws PFAS in certain products
cen.acs.org
October 14, 2025 at 6:19 PM
New Mexico is proposing warning labels for #PFAS across a wide range of consumer products starting next year, similar to California's Prop 65 labels. This is part of the rule-making for a new law that also phases out many products with PFAS. More in @cenmag.bsky.social: cen.acs.org/policy/New-M...
My first foray into food chemicals -- which I'm learning is a busy, busy beat right now, especially at the state level
West Virginia enacted the US’s first broad ban on synthetic food dyes in March. On Monday, an industry group filed the first lawsuit seeking to overturn the ban. cen.acs.org/policy/West-...
West Virginia’s sweeping food dye ban faces its first lawsuit
The International Association of Color Manufacturers is asking a federal court to strike down the state’s groundbreaking recent action against several synthetic food dyes
cen.acs.org
October 13, 2025 at 7:21 PM
My first foray into food chemicals -- which I'm learning is a busy, busy beat right now, especially at the state level
My new colleagues really commit to the bit
Once you get dengue fever, you're at a much greater risk of severe disease if you ever get it again due to something called antibody dependent enhancement.
So why did I choose to purposely be infected with dengue?
Read my latest for @cenmag.bsky.social to find out. I'm quite proud of this one.
So why did I choose to purposely be infected with dengue?
Read my latest for @cenmag.bsky.social to find out. I'm quite proud of this one.
I was injected with dengue virus to learn about clinical trials
I became a test subject in a clinical trial for a new dengue treatment. Here’s what I discovered
cen.acs.org
October 13, 2025 at 7:16 PM
My new colleagues really commit to the bit
New job, new beat: I'm now covering PFAS, pesticides and other chemicals in food, ag and water for @cenmag.bsky.social. Would love to connect with sources -- please do reach out with tips (or just intros)!
My new email is D_Erdenesanaa at acs dot org. Signal remains edelger dot 10.
My new email is D_Erdenesanaa at acs dot org. Signal remains edelger dot 10.
September 30, 2025 at 4:41 PM
New job, new beat: I'm now covering PFAS, pesticides and other chemicals in food, ag and water for @cenmag.bsky.social. Would love to connect with sources -- please do reach out with tips (or just intros)!
My new email is D_Erdenesanaa at acs dot org. Signal remains edelger dot 10.
My new email is D_Erdenesanaa at acs dot org. Signal remains edelger dot 10.
Reposted by Delger Erdenesanaa
Open-source intelligence (OSINT) tools are changing the way we can monitor the ocean. The @pulitzercenter.org is hosting a webinar on Tues, Sept 9, at 12pm US ET, for investigative journalists, environmental reporters & data enthusiasts looking to deepen their reporting using OSINT.
How To OSINT the Ocean
The ocean may seem vast and opaque, but open-source intelligence (OSINT) tools are changing the way we monitor it. From tracking illegal fishing and ship movements to uncovering pollution and port…
buff.ly
September 7, 2025 at 4:11 PM
Open-source intelligence (OSINT) tools are changing the way we can monitor the ocean. The @pulitzercenter.org is hosting a webinar on Tues, Sept 9, at 12pm US ET, for investigative journalists, environmental reporters & data enthusiasts looking to deepen their reporting using OSINT.
Published a story with @rjnskl.bsky.social last week on the future of the ocean under growing human pressures -- and the future of cultures and economies built on the ocean and coastlines. www.nytimes.com/interactive/...
Humans Are Altering the Seas. Here’s What the Future Ocean Might Look Like. (Gift Article)
Some marine ecosystems could soon be unrecognizable, according to new research. We mapped the possibilities.
www.nytimes.com
September 8, 2025 at 9:32 PM
Published a story with @rjnskl.bsky.social last week on the future of the ocean under growing human pressures -- and the future of cultures and economies built on the ocean and coastlines. www.nytimes.com/interactive/...
Highly recommend to any journalists with an ocean story to tell! You get the rare gift of time (and travel $) to pursue ambitious stories. You also learn a ton from the Pulitzer Center's data and research team, as well as from your cohort -- who will be impressive journalists from around the world!
Attention ocean reporters! 🌊 🌊 🌊
Applications are now open for the 3rd cohort of the @pulitzercenter.org's Ocean Reporting Network (ORN).
Apply by September 12!
👉 bit.ly/41cfqXA
Join our Ask Me Anything session on August 27!
👉 bit.ly/3UX5yNT
Applications are now open for the 3rd cohort of the @pulitzercenter.org's Ocean Reporting Network (ORN).
Apply by September 12!
👉 bit.ly/41cfqXA
Join our Ask Me Anything session on August 27!
👉 bit.ly/3UX5yNT
August 21, 2025 at 3:13 PM
Highly recommend to any journalists with an ocean story to tell! You get the rare gift of time (and travel $) to pursue ambitious stories. You also learn a ton from the Pulitzer Center's data and research team, as well as from your cohort -- who will be impressive journalists from around the world!
Reposted by Delger Erdenesanaa
Efforts by countries like Russia and Iran to circumvent Western sanctions on their petroleum have spawned a black market at sea, leading to a surge in human rights abuses of the seafarers recruited.
Story by ORN Fellow @katiemcque.bsky.social for @contextnewsroom.bsky.social. bit.ly/4mjwAuE
Story by ORN Fellow @katiemcque.bsky.social for @contextnewsroom.bsky.social. bit.ly/4mjwAuE
The Cost of Sanctions: Dark Shipping Fleet Fuels Human Trafficking
What’s the context? A clandestine network smuggling sanctioned oil around the globe has lured thousands of seafarers into dangerous jobs. NEW YORK - When the crew on board a small fishing vessel off.....
pulitzercenter.org
August 20, 2025 at 3:49 PM
Efforts by countries like Russia and Iran to circumvent Western sanctions on their petroleum have spawned a black market at sea, leading to a surge in human rights abuses of the seafarers recruited.
Story by ORN Fellow @katiemcque.bsky.social for @contextnewsroom.bsky.social. bit.ly/4mjwAuE
Story by ORN Fellow @katiemcque.bsky.social for @contextnewsroom.bsky.social. bit.ly/4mjwAuE
This is such an important story for the ocean. Losing these sea stars meant losing whole forests of kelp, whole ecosystems. And although scientists have just identified the bacteria behind the disease, as this story points out, they already knew there was a "co-conspirator" in rising temperatures.
Sea stars—26 species—have been dying by the billions from Mexico to Alaska, their arms tearing off, their bodies dissolving, w/huge consequences for the sea.
Experts finally figured out why— and gave @biographic.bsky.social exclusive access.
Can we save them? www.biographic.com/unmasking-th...
Experts finally figured out why— and gave @biographic.bsky.social exclusive access.
Can we save them? www.biographic.com/unmasking-th...
Unmasking the Sea Star Killer
After a decade of carnage, we finally know what’s devastating sea stars along North America’s West Coast. Does that mean scientists can save them?
www.biographic.com
August 7, 2025 at 8:31 PM
This is such an important story for the ocean. Losing these sea stars meant losing whole forests of kelp, whole ecosystems. And although scientists have just identified the bacteria behind the disease, as this story points out, they already knew there was a "co-conspirator" in rising temperatures.
Reposted by Delger Erdenesanaa
Update: Our friend @alecluhn.bsky.social was found alive this morning!
He is in good health with some injuries to his leg/foot. He is at a hospital in Bergen now. Thank you to the Norwegian helicopter team who found him and all the volunteers who searched in bad conditions. ❤️
He is in good health with some injuries to his leg/foot. He is at a hospital in Bergen now. Thank you to the Norwegian helicopter team who found him and all the volunteers who searched in bad conditions. ❤️
My friend Alec is missing. Please share this widely incase it reachers any hikers who have seen him over the past 5 days during his solo hike in a Norwegian national park.
I’m sharing this hoping that someone hiking the same route in Norway might see this. Let’s find @alecluhn.bsky.social!
August 6, 2025 at 2:34 PM
Update: Our friend @alecluhn.bsky.social was found alive this morning!
He is in good health with some injuries to his leg/foot. He is at a hospital in Bergen now. Thank you to the Norwegian helicopter team who found him and all the volunteers who searched in bad conditions. ❤️
He is in good health with some injuries to his leg/foot. He is at a hospital in Bergen now. Thank you to the Norwegian helicopter team who found him and all the volunteers who searched in bad conditions. ❤️
In case I have any followers in Norway -- my colleague Alec Luhn is missing after a solo hiking trip in the Folgefonna / Nedre Buarbreen area. The Red Cross is searching, but if anyone has seen Alec by chance, they can call the local police at 02800 or email Morten.Fosse2@politiet.no with info.
I’m sharing this hoping that someone hiking the same route in Norway might see this. Let’s find @alecluhn.bsky.social!
American climate journalist Alec Luhn missing on Norwegian glacier
A search is underway for award-winning climate journalist Alec Luhn, a Wisconsin native, who is missing on a Norwegian glacier.
www.cbsnews.com
August 5, 2025 at 4:48 PM
In case I have any followers in Norway -- my colleague Alec Luhn is missing after a solo hiking trip in the Folgefonna / Nedre Buarbreen area. The Red Cross is searching, but if anyone has seen Alec by chance, they can call the local police at 02800 or email Morten.Fosse2@politiet.no with info.
Reposted by Delger Erdenesanaa
If you're in the Northern Hemisphere, chances are you've endured a heatwave. But have you considered what this extreme heat looks like beneath the surface?
#ORN Fellow @edelger.bsky.social uncovers, for @nytimes.com, how marine heatwaves, once rare, are now recurring. bit.ly/44zgG81
#ORN Fellow @edelger.bsky.social uncovers, for @nytimes.com, how marine heatwaves, once rare, are now recurring. bit.ly/44zgG81
See How Marine Heat Waves Are Spreading Across the Globe
Sea surface temperatures in 2024 broke records and about a quarter of the world’s oceans are experiencing temperatures that qualify as a marine heat wave. In recent decades, the oceans have warmed...
pulitzercenter.org
July 2, 2025 at 3:47 PM
If you're in the Northern Hemisphere, chances are you've endured a heatwave. But have you considered what this extreme heat looks like beneath the surface?
#ORN Fellow @edelger.bsky.social uncovers, for @nytimes.com, how marine heatwaves, once rare, are now recurring. bit.ly/44zgG81
#ORN Fellow @edelger.bsky.social uncovers, for @nytimes.com, how marine heatwaves, once rare, are now recurring. bit.ly/44zgG81
Easy-to-miss news amid the chaos: At the 3rd UN ocean conference, countries declared 20+ new marine protected areas, but thousands more are needed to reach a goal of protecting 30% of the ocean by 2030. Questions also remain about how meaningful these protections are. www.nytimes.com/2025/06/14/c...
At U.N. Conference, Countries Inch Toward Ocean Protection Goal
www.nytimes.com
June 16, 2025 at 4:04 PM
Easy-to-miss news amid the chaos: At the 3rd UN ocean conference, countries declared 20+ new marine protected areas, but thousands more are needed to reach a goal of protecting 30% of the ocean by 2030. Questions also remain about how meaningful these protections are. www.nytimes.com/2025/06/14/c...
As politicians from around the world discuss the ocean in Nice this week for #UNOC3, the ocean itself continues to warm from climate change. My latest story dives into the toll this takes on marine wildlife and fisheries: www.nytimes.com/2025/06/09/c...
See How Marine Heat Waves Are Spreading Across the Globe
www.nytimes.com
June 10, 2025 at 2:39 PM
As politicians from around the world discuss the ocean in Nice this week for #UNOC3, the ocean itself continues to warm from climate change. My latest story dives into the toll this takes on marine wildlife and fisheries: www.nytimes.com/2025/06/09/c...