Charlotte H. Chang
@harpactes.bsky.social
👋 Follow for insights on NLP, conservation, and climate
https://chang.eco
One Conservancy Visiting Fellow at TNC
Professor Bio/EA @PomonaCollege
Alum: Smith Fellows, NIMBioS @UTK, Levin Lab @Princeton
Mom, birding enthusiast, dog lover
https://chang.eco
One Conservancy Visiting Fellow at TNC
Professor Bio/EA @PomonaCollege
Alum: Smith Fellows, NIMBioS @UTK, Levin Lab @Princeton
Mom, birding enthusiast, dog lover
Pinned
Charlotte H. Chang
@harpactes.bsky.social
· Nov 10
Environmental users abandoned Twitter after Musk takeover
In our sample of 380 000 environmentally oriented users, nearly 50% became inactive
on Twitter after it was sold in October 2022, a rate much higher than a control sample.
Given Twitter’s importance f...
www.cell.com
Hey Bluesky!
I'm here looking for a community of scientists that talk about conservation and climate change.
My previous work showed that over half of these people left Twitter after Elon Musk's takeover in 2022.
www.theguardian.com/environment/...
www.cell.com/trends/ecolo...
I'm here looking for a community of scientists that talk about conservation and climate change.
My previous work showed that over half of these people left Twitter after Elon Musk's takeover in 2022.
www.theguardian.com/environment/...
www.cell.com/trends/ecolo...
Reposted by Charlotte H. Chang
This is a fascinating study showing how misaligned venture capital can be when it comes to climate. Instead of chasing high-impact carbon solutions, it tends to chase fads.
We need to do a better job aligning our money with a more substantial climate impact.
iopscience.iop.org/article/10.1...
We need to do a better job aligning our money with a more substantial climate impact.
iopscience.iop.org/article/10.1...
November 24, 2025 at 4:47 PM
This is a fascinating study showing how misaligned venture capital can be when it comes to climate. Instead of chasing high-impact carbon solutions, it tends to chase fads.
We need to do a better job aligning our money with a more substantial climate impact.
iopscience.iop.org/article/10.1...
We need to do a better job aligning our money with a more substantial climate impact.
iopscience.iop.org/article/10.1...
Incredibly proud of my former student, Rohan Gowda Thanh Quang. His new paper in 𝘌𝘯𝘷𝘪𝘳𝘰𝘯𝘮𝘦𝘯𝘵𝘢𝘭 𝘙𝘦𝘴𝘦𝘢𝘳𝘤𝘩: 𝘌𝘯𝘦𝘳𝘨𝘺 analyzed $128B in US climate investments & finds that 𝘃𝗲𝗻𝘁𝘂𝗿𝗲 𝗰𝗮𝗽𝗶𝘁𝗮𝗹 𝗶𝘀 𝘀𝘆𝘀𝘁𝗲𝗺𝗮𝘁𝗶𝗰𝗮𝗹𝗹𝘆 𝗺𝗶𝘀𝘀𝗶𝗻𝗴 𝘁𝗵𝗲 𝗵𝗶𝗴𝗵𝗲𝘀𝘁-𝗶𝗺𝗽𝗮𝗰𝘁 𝗰𝗹𝗶𝗺𝗮𝘁𝗲 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 - especially nature-based solutions. Results in 🧵: 1/9
November 24, 2025 at 5:50 PM
Incredibly proud of my former student, Rohan Gowda Thanh Quang. His new paper in 𝘌𝘯𝘷𝘪𝘳𝘰𝘯𝘮𝘦𝘯𝘵𝘢𝘭 𝘙𝘦𝘴𝘦𝘢𝘳𝘤𝘩: 𝘌𝘯𝘦𝘳𝘨𝘺 analyzed $128B in US climate investments & finds that 𝘃𝗲𝗻𝘁𝘂𝗿𝗲 𝗰𝗮𝗽𝗶𝘁𝗮𝗹 𝗶𝘀 𝘀𝘆𝘀𝘁𝗲𝗺𝗮𝘁𝗶𝗰𝗮𝗹𝗹𝘆 𝗺𝗶𝘀𝘀𝗶𝗻𝗴 𝘁𝗵𝗲 𝗵𝗶𝗴𝗵𝗲𝘀𝘁-𝗶𝗺𝗽𝗮𝗰𝘁 𝗰𝗹𝗶𝗺𝗮𝘁𝗲 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 - especially nature-based solutions. Results in 🧵: 1/9
Absolutely! So many friends have been struggling with housing affordability trying to rent in Southern California after the Eaton fire. They may be moving locally, but they are still climate refugees!
Many people don't realise how climate change is already - not in the future - affecting our lives. And it's doing so in ways that, once our eyes are opened, we can notice!
For example, food. h/t @climatecentral.org
For example, food. h/t @climatecentral.org
November 19, 2025 at 6:03 PM
Absolutely! So many friends have been struggling with housing affordability trying to rent in Southern California after the Eaton fire. They may be moving locally, but they are still climate refugees!
I wonder if this marks a broader shift from participation in content creation to passive content consumption, or if it simply reflects how online social behavior has moved off of legacy social media platforms (“public square”) into group chats (“private salons”)
Is social media dying? How much has Twitter changed as it became X? Which party now dominates the conversation?
Using nationally representative ANES data from 2020 & 2024, I map how the U.S. social media landscape has transformed.
Here are the key take-aways 🧵
arxiv.org/abs/2510.25417
Using nationally representative ANES data from 2020 & 2024, I map how the U.S. social media landscape has transformed.
Here are the key take-aways 🧵
arxiv.org/abs/2510.25417
October 31, 2025 at 5:35 PM
I wonder if this marks a broader shift from participation in content creation to passive content consumption, or if it simply reflects how online social behavior has moved off of legacy social media platforms (“public square”) into group chats (“private salons”)
Reposted by Charlotte H. Chang
Chatbots — LLMs — do not know facts and are not designed to be able to accurately answer factual questions. They are designed to find and mimic patterns of words, probabilistically. When they’re “right” it’s because correct things are often written down, so those patterns are frequent. That’s all.
June 19, 2025 at 11:21 AM
Chatbots — LLMs — do not know facts and are not designed to be able to accurately answer factual questions. They are designed to find and mimic patterns of words, probabilistically. When they’re “right” it’s because correct things are often written down, so those patterns are frequent. That’s all.
Reposted by Charlotte H. Chang
this, to me, is art
September 28, 2025 at 11:29 PM
this, to me, is art
#DataScience & #EnvironmentDS education community: curious about your ideas on a project-based learning module focused on addressing the climate/biodiversity/poverty triple challenge. One thought: have students read papers such as this recent publication by @jasonhickel.bsky.social & replicate it.
Providing decent living standards for 8.5 billion people requires only 30% of current global energy and material use.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
How much growth is required to achieve good lives for all? Insights from needs-based analysis
Some narratives in international development hold that ending poverty and achieving good lives for all will require every country to reach the levels …
www.sciencedirect.com
August 15, 2025 at 7:18 PM
#DataScience & #EnvironmentDS education community: curious about your ideas on a project-based learning module focused on addressing the climate/biodiversity/poverty triple challenge. One thought: have students read papers such as this recent publication by @jasonhickel.bsky.social & replicate it.
Excited that our work on nature-based climate solutions and #NLP is being shared on #TheAcademicMinute on @npr.org — thanks to everyone who made this opportunity possible.
academicminute.org/charlotte-ch...
Shout-out to my co-authors (on BSky): @jterbaugh.bsky.social @berobinson.bsky.social
academicminute.org/charlotte-ch...
Shout-out to my co-authors (on BSky): @jterbaugh.bsky.social @berobinson.bsky.social
Charlotte Chang, Pomona College - Mapping the Local Impacts of Global Nature-Based Carbon Mitigation - The Academic Minute
On Pomona College Week: Natural climate solutions have a role to play in fighting climate change. Charlotte Chang, assistant professor of biology and environmental analysis, explores how. Charlotte Ch...
academicminute.org
August 14, 2025 at 3:57 PM
Excited that our work on nature-based climate solutions and #NLP is being shared on #TheAcademicMinute on @npr.org — thanks to everyone who made this opportunity possible.
academicminute.org/charlotte-ch...
Shout-out to my co-authors (on BSky): @jterbaugh.bsky.social @berobinson.bsky.social
academicminute.org/charlotte-ch...
Shout-out to my co-authors (on BSky): @jterbaugh.bsky.social @berobinson.bsky.social
Who is working on AI frameworks for evaluation, fairness, ethics etc in conservation biology or ecology? (“Safety” is an overloaded term…) www.nature.com/articles/s41...
A practical framework for appropriate implementation and review of artificial intelligence (FAIR-AI) in healthcare - npj Digital Medicine
npj Digital Medicine - A practical framework for appropriate implementation and review of artificial intelligence (FAIR-AI) in healthcare
www.nature.com
August 11, 2025 at 11:34 PM
Who is working on AI frameworks for evaluation, fairness, ethics etc in conservation biology or ecology? (“Safety” is an overloaded term…) www.nature.com/articles/s41...
Reposted by Charlotte H. Chang
if you are overwhelmed, I highly recommend:
-making a list of things you don't care about being out of the loop
-cutting down on alcohol
-cleaning, organizing and decluttering your home instead of doomscrolling
-making plans with friends
-weekly therapy
-charging your phone away from your bed
-making a list of things you don't care about being out of the loop
-cutting down on alcohol
-cleaning, organizing and decluttering your home instead of doomscrolling
-making plans with friends
-weekly therapy
-charging your phone away from your bed
August 11, 2025 at 2:56 AM
if you are overwhelmed, I highly recommend:
-making a list of things you don't care about being out of the loop
-cutting down on alcohol
-cleaning, organizing and decluttering your home instead of doomscrolling
-making plans with friends
-weekly therapy
-charging your phone away from your bed
-making a list of things you don't care about being out of the loop
-cutting down on alcohol
-cleaning, organizing and decluttering your home instead of doomscrolling
-making plans with friends
-weekly therapy
-charging your phone away from your bed
Attention is All You Have
June 26, 2025 at 5:35 PM
Attention is All You Have
I don’t disagree, but I wonder how we can preserve loose ties (joy of learning, social movement formation) as platforms continue to enshittify.
Anecdotally, parts of science Twitter shifted to gated Slack/Discord groups after Musk took over. But they lost outside attention and idea sharing.
Anecdotally, parts of science Twitter shifted to gated Slack/Discord groups after Musk took over. But they lost outside attention and idea sharing.
I think AI is going to eventually tank in the longterm, but...
the only real way to combat this is single-interest communities. Forums, user comms, etc, with a barrier to entry. They become trustable knowledgebases. It's really the only way forward is to return to what worked best the first time
the only real way to combat this is single-interest communities. Forums, user comms, etc, with a barrier to entry. They become trustable knowledgebases. It's really the only way forward is to return to what worked best the first time
June 25, 2025 at 2:42 PM
I don’t disagree, but I wonder how we can preserve loose ties (joy of learning, social movement formation) as platforms continue to enshittify.
Anecdotally, parts of science Twitter shifted to gated Slack/Discord groups after Musk took over. But they lost outside attention and idea sharing.
Anecdotally, parts of science Twitter shifted to gated Slack/Discord groups after Musk took over. But they lost outside attention and idea sharing.
NEW PAPER ALERT! 🌿🤖 Our essay on how #AI and #NLP can transform conservation evidence synthesis just dropped in #ConservationBiology. We explore how machine learning can help scientists tackle the explosion of research across disciplines to better inform conservation policy. 🧵: 1/6
April 8, 2025 at 3:16 PM
NEW PAPER ALERT! 🌿🤖 Our essay on how #AI and #NLP can transform conservation evidence synthesis just dropped in #ConservationBiology. We explore how machine learning can help scientists tackle the explosion of research across disciplines to better inform conservation policy. 🧵: 1/6
(Late to the party but ...) #BirdersOfBluesky: who were your First Birds Of the Year (FBOYs)?
Yard/window FBOY: A dapper + tuxedoed Black Phoebe
Binocular FBOY: A very confiding White-breasted Nuthatch
Digiscoped FBOY: An unusually out-and-about Sora
Wishing everyone a very birdy 🦜🦉 2025!
Yard/window FBOY: A dapper + tuxedoed Black Phoebe
Binocular FBOY: A very confiding White-breasted Nuthatch
Digiscoped FBOY: An unusually out-and-about Sora
Wishing everyone a very birdy 🦜🦉 2025!
January 3, 2025 at 1:01 AM
(Late to the party but ...) #BirdersOfBluesky: who were your First Birds Of the Year (FBOYs)?
Yard/window FBOY: A dapper + tuxedoed Black Phoebe
Binocular FBOY: A very confiding White-breasted Nuthatch
Digiscoped FBOY: An unusually out-and-about Sora
Wishing everyone a very birdy 🦜🦉 2025!
Yard/window FBOY: A dapper + tuxedoed Black Phoebe
Binocular FBOY: A very confiding White-breasted Nuthatch
Digiscoped FBOY: An unusually out-and-about Sora
Wishing everyone a very birdy 🦜🦉 2025!
Congratulations to @xinruiong.bsky.social for leading this phenomenal study - points the way for some helpful steps forward for insect conservation efforts in Southeast Asia!
Ushering in 2025 is our latest publication in Ecology Letters! Through a quantitative assessment of insect occurrence records, insect studies and '#conservation' posts, we identified gaps in five areas and suggest potential solutions to enable insect conservation efforts in Southeast Asia. (1/n)
January 3, 2025 at 12:52 AM
Congratulations to @xinruiong.bsky.social for leading this phenomenal study - points the way for some helpful steps forward for insect conservation efforts in Southeast Asia!
Kali - "Three is technically a starter pack but we're more of a power ✨ trio" 🐕 🐾
#academicdogs
what #starterpack more like a #barkerpack
#dogsofbluesky
#academicdogs
what #starterpack more like a #barkerpack
#dogsofbluesky
December 17, 2024 at 3:22 PM
Kali - "Three is technically a starter pack but we're more of a power ✨ trio" 🐕 🐾
#academicdogs
what #starterpack more like a #barkerpack
#dogsofbluesky
#academicdogs
what #starterpack more like a #barkerpack
#dogsofbluesky
The world is betting on nature-based climate solutions (NCS): 💵 has doubled in 6 years & global commitments total 1.2 billion ha (4x India’s land area).
Do these projects benefit people and biodiversity, not just carbon markets? We analyzed millions of papers with #ML. Here's what we found. 🧵 1/7
Do these projects benefit people and biodiversity, not just carbon markets? We analyzed millions of papers with #ML. Here's what we found. 🧵 1/7
Getting carbon markets right requires understanding local impacts of global offset projects
Interest in natural climate solutions (NCS) is substantial and growing, but their impacts on human well-being and biodiversity and ecosystem services ("NCS co-impacts") are undercharacterized. We crea...
communities.springernature.com
December 10, 2024 at 2:59 PM
The world is betting on nature-based climate solutions (NCS): 💵 has doubled in 6 years & global commitments total 1.2 billion ha (4x India’s land area).
Do these projects benefit people and biodiversity, not just carbon markets? We analyzed millions of papers with #ML. Here's what we found. 🧵 1/7
Do these projects benefit people and biodiversity, not just carbon markets? We analyzed millions of papers with #ML. Here's what we found. 🧵 1/7
Cool example from @conspirator0.bsky.social of how to extract and process data from the Bluesky firehose. In this case, it was to identify bots through profile content and posting behavior. But this same approach can be used to answer myriad questions about how we interact with each other online.
Substack post with more detail, as well as the Python code used for this experiment:
conspirator0.substack.com/p/spam-in-th...
conspirator0.substack.com/p/spam-in-th...
Spam in the firehose
Using repeated text in the Bluesky firehose to detect spam accounts in near-real time
conspirator0.substack.com
December 8, 2024 at 4:54 PM
Cool example from @conspirator0.bsky.social of how to extract and process data from the Bluesky firehose. In this case, it was to identify bots through profile content and posting behavior. But this same approach can be used to answer myriad questions about how we interact with each other online.
The impacts of natural climate solutions: we analyzed millions of scientific studies for a comprehensive analysis of *what* evidence exists for NCS and impacts to people and nature. New work out in @naturesustain.bsky.social doi.org/10.1038/s418...
#ncs #naturebasedsolutions 🧪 #NLP #ConservationAI
#ncs #naturebasedsolutions 🧪 #NLP #ConservationAI
December 5, 2024 at 4:22 PM
The impacts of natural climate solutions: we analyzed millions of scientific studies for a comprehensive analysis of *what* evidence exists for NCS and impacts to people and nature. New work out in @naturesustain.bsky.social doi.org/10.1038/s418...
#ncs #naturebasedsolutions 🧪 #NLP #ConservationAI
#ncs #naturebasedsolutions 🧪 #NLP #ConservationAI
Reposted by Charlotte H. Chang
#NaturalClimateSolutions try to address global climate problems, but how do they impact local communities? We review what we know from >250 K articles in work with @harpactes.bsky.social, @jterbaugh.bsky.social, and many others (not yet here!) is just out in @naturesustain.bsky.social
rdcu.be/d10Nh
rdcu.be/d10Nh
Global evidence of human well-being and biodiversity impacts of natural climate solutions
Nature Sustainability - Rich evidence of the potential co-benefits and trade-offs of natural climate solutions is available but remains poorly understood. Assessing the literature with machine...
rdcu.be
December 4, 2024 at 5:28 PM
#NaturalClimateSolutions try to address global climate problems, but how do they impact local communities? We review what we know from >250 K articles in work with @harpactes.bsky.social, @jterbaugh.bsky.social, and many others (not yet here!) is just out in @naturesustain.bsky.social
rdcu.be/d10Nh
rdcu.be/d10Nh
Reposted by Charlotte H. Chang
In our research (out today in @naturesustain.bsky.social), we provide a comprehensive evidence map for the co-impacts from #NaturalClimateSolutions using large language models (in addition to other interesting models!) to synthesize information from >250 K articles.
rdcu.be/d10Nh
rdcu.be/d10Nh
Global evidence of human well-being and biodiversity impacts of natural climate solutions
Nature Sustainability - Rich evidence of the potential co-benefits and trade-offs of natural climate solutions is available but remains poorly understood. Assessing the literature with machine...
rdcu.be
December 2, 2024 at 7:19 PM
In our research (out today in @naturesustain.bsky.social), we provide a comprehensive evidence map for the co-impacts from #NaturalClimateSolutions using large language models (in addition to other interesting models!) to synthesize information from >250 K articles.
rdcu.be/d10Nh
rdcu.be/d10Nh
Who else thinks Black Skimmer is like a tern x toucan? So nice to see them🪶 #birds #birdphotography
December 2, 2024 at 3:35 PM
Who else thinks Black Skimmer is like a tern x toucan? So nice to see them🪶 #birds #birdphotography
What we're seeing here is the debasement of scientific currency of papers and citations, in the same way that printing money drives inflation.
So how are we supposed to account for the *quality* of evidence in papers or bodies of work when the *quantity* is overwhelming?
So how are we supposed to account for the *quality* of evidence in papers or bodies of work when the *quantity* is overwhelming?
The strain on scientific publishing: we set out to characterise the remarkable growth of the scientific literature in the last few years, in spite of declining growth in total scientists. What is going on?
direct.mit.edu/qss/article/...
A 🧵 1/n
#AcademicSky #PhDchat #ScientificPublishing #SciPub
direct.mit.edu/qss/article/...
A 🧵 1/n
#AcademicSky #PhDchat #ScientificPublishing #SciPub
November 25, 2024 at 4:34 PM
What we're seeing here is the debasement of scientific currency of papers and citations, in the same way that printing money drives inflation.
So how are we supposed to account for the *quality* of evidence in papers or bodies of work when the *quantity* is overwhelming?
So how are we supposed to account for the *quality* of evidence in papers or bodies of work when the *quantity* is overwhelming?