Prof William Ripple @williamripple.bsky.social · 28/09/2026We invite everyone (nonscientists) to endorse the Declaration of a Planetary Emergency, part of the upcoming World Scientists’ Warning to Humanity: A Third Notice. Add your name and share widely. Endorsement helps show public concern about the future of our planet. forms.gle/vAARd7mv2yS7... 39077
Prof William Ripple @williamripple.bsky.social · 23/09/2026We invite everyone to endorse the Declaration of a Planetary Emergency, part of the upcoming World Scientists’ Warning to Humanity: A Third Notice. Please add your name and share widely. Every endorsement helps show public concern about the future of our planet. docs.google.com/forms/d/e/1F... 28347
Prof William Ripple @williamripple.bsky.social · 13/08/2026Scientists worldwide: We invite you to sign the World Scientists’ Warning to Humanity: A Third Notice. Thirty-five years after the first warning, we now declare a planetary emergency. Please read, sign, and share by going to this link: docs.google.com/forms/d/e/1F... @ecowarriorss.bsky.social 42018
Prof William Ripple @williamripple.bsky.social · 27/07/2026Scientists worldwide: We invite you to sign the World Scientists’ Warning to Humanity: A Third Notice. Thirty-five years after the first warning, the scientific evidence is even stronger. Please read, sign, and share by going to this link: docs.google.com/forms/d/e/1F... 03329
Reposted by Prof William RippleProf William Ripple @williamripple.bsky.social · 08/12/2025In our Climate Report my coauthors and I say: We are hurtling toward climate chaos. The planet's vital signs are flashing red. Consequences of human-driven alterations of the climate are no longer future threats but are here now. Read report here doi.org/10.1093/bios...doi.orgThe 2025 state of the climate report: a planet on the brinkWe are hurtling toward climate chaos. The planet's vital signs are flashing red. The consequences of human-driven alterations of the climate are no longer 7189112
Reposted by Prof William RippleProf William Ripple @williamripple.bsky.social · 16/02/2026The Guardian just published a story on our paper "The Risk of a Hothouse Earth Trajectory" regarding a potential point of no return. You can read it for free here: www.theguardian.com/environment/...theguardian.comPoint of no return: a hellish ‘hothouse Earth’ getting closer, scientists sayContinued global heating could set irreversible course by triggering climate tipping points, but most people unaware 35727
Prof William Ripple @williamripple.bsky.social · 16/02/2026The Guardian just published a story on our paper "The Risk of a Hothouse Earth Trajectory" regarding a potential point of no return. You can read it for free here: www.theguardian.com/environment/...theguardian.comPoint of no return: a hellish ‘hothouse Earth’ getting closer, scientists sayContinued global heating could set irreversible course by triggering climate tipping points, but most people unaware 35727
Prof William Ripple @williamripple.bsky.social · 11/02/2026Concerned about the Point of No Return? Today we published a paper on the risk of a hothouse Earth trajectory. You can read it here: authors.elsevier.com/c/1mbW49C~Iu... 69763
Prof William Ripple @williamripple.bsky.social · 08/12/2025In our Climate Report my coauthors and I say: We are hurtling toward climate chaos. The planet's vital signs are flashing red. Consequences of human-driven alterations of the climate are no longer future threats but are here now. Read report here doi.org/10.1093/bios...doi.orgThe 2025 state of the climate report: a planet on the brinkWe are hurtling toward climate chaos. The planet's vital signs are flashing red. The consequences of human-driven alterations of the climate are no longer 7189112
Prof William Ripple @williamripple.bsky.social · 27/11/2025SETTING: SOMETIME IN THE FUTURE: We were hurtling towards climate chaos which ended up really hurting the economy. More info here: doi.org/10.1093/bios... 013656
Prof William Ripple @williamripple.bsky.social · 22/11/2025In our Climate Report my coauthors and I say: We are hurtling toward climate chaos. The planet's vital signs are flashing red. Consequences of human-driven alterations of the climate are no longer future threats but are here now. Read report here doi.org/10.1093/bios...doi.orgThe 2025 state of the climate report: a planet on the brinkWe are hurtling toward climate chaos. The planet's vital signs are flashing red. The consequences of human-driven alterations of the climate are no longer 617296
Prof William Ripple @williamripple.bsky.social · 20/11/2025We recently published a report that serves as a warning to humanity that we are hurtling towards climate chaos. More info here: doi.org/10.1093/bios... 47441
Prof William Ripple @williamripple.bsky.social · 16/11/2025You might turn off the tap and also read our new 2025 State of the Climate Report here where we wrote "We are hurtling toward climate chaos. The planet's vital signs are flashing red" doi.org/10.1093/bios... 111229
Prof William Ripple @williamripple.bsky.social · 14/11/2025And we warned them with our new 2025 State of the Climate Report which you can check out here: doi.org/10.1093/bios... 8729181
Prof William Ripple @williamripple.bsky.social · 11/11/2025See our new dire new warning about the state of the planet doi.org/10.1093/bios... | grist.org/climate/scie...grist.orgScientists have a dire new warning about the state of the planetRecent climatic developments "mark the beginning of a grim new chapter for life on Earth," but it's not too late for radical action. 76536
Prof William Ripple @williamripple.bsky.social · 09/11/2025We just published a report that serves as a warning to humanity that we are hurtling towards climate chaos. More info here: doi.org/10.1093/bios... and here www.nationthailand.com/blogs/sustai...nationthailand.comEarth hits hottest level in 125,000 yearsA global study finds 2024 was hotter than the peak of the last Ice Age, with record-breaking heat, ocean warming, and ice loss driving Earth toward irreversible tipping points. 48742
Prof William Ripple @williamripple.bsky.social · 09/11/2025In our State of the Climate Report, my coauthors and start by saying: We are hurtling toward climate chaos. The planet's vital signs are flashing red. The consequences of human-driven alterations of the climate are no longer future threats but are here now. Read report here doi.org/10.1093/bios... 411647
Prof William Ripple @williamripple.bsky.social · 08/11/2025As we alarmingly wrote "We are hurtling toward climate chaos" in our new State of the Climate Report which just came out. We may be on the path of a hothouse Earth trajectory as shown in this figure. Read the full report: doi.org/10.1093/bios... 34123
Prof William Ripple @williamripple.bsky.social · 02/11/2025Our 2025 State of the Climate Report was just published in BioScience by scientists from around the world including @michaelemann.bsky.social @petergleick.bsky.social This video (2 minutes) shows the key highlights: doi.org/10.1093/bios... 411864
Reposted by Prof William RippleOxford Academic @academic.oup.com · 31/10/2025🚨 Earth's vital signs are flashing red. 🌡️ 2024 was the hottest year in recorded history. Read the latest Climate report from @williamripple.bsky.social and Christopher Wolf's team, published in BioScience. oxford.ly/47i6K5j 04533
Prof William Ripple @williamripple.bsky.social · 29/10/2025The window to act on climate is rapidly closing. Our new 2025 State of the Climate report is just out. Read the full report here: doi.org/10.1093/bios... @michaelemann.bsky.social @dwallacewells.bsky.social @georgemonbiot.bsky.social @ecowarriorss.bsky.social 711582
Prof William Ripple @williamripple.bsky.social · 29/10/2025As we alarmingly wrote "We are hurtling toward climate chaos" in our new State of the Climate Report which just came out. It is well covered by the LA times. Thanks to my set of distinguished coauthors including @michaelemann.bsky.social @petergleick.bsky.social and others. 39550
Prof William Ripple @williamripple.bsky.social · 20/10/2025Defaunation. . . . www.theguardian.com/environment/...theguardian.comWorld’s landscapes may soon be ‘devoid of wild animals’, says nature photographerMargot Raggett, whose latest compilation shows animals scrubbed from natural habitats, calls for rethink on UK accelerated housebuilding 085
Prof William Ripple @williamripple.bsky.social · 06/10/2025This is key for planetary and personal health: www.theguardian.com/environment/...theguardian.com‘Planetary health diet’ could save 40,000 deaths a day, landmark report findsDiet allows modest meat consumption and would also slash food-related climate emissions by half, says report by 70 leading experts from 35 countries 47132
Prof William Ripple @williamripple.bsky.social · 03/09/2025Thanks to @andrewdessler.com for leading our group of 85 scientists to denounce the Trump administration's climate report which is packed full of misinformation. @michaelemann.bsky.social www.nytimes.com/2025/09/02/c...nytimes.comScientists Denounce Trump Administration’s Climate Report 08026
Prof William Ripple @williamripple.bsky.social · 03/09/2025I am pleased to be on the science team that wrote a very long response to to the Administration's DOE climate report which is full of errors. Thanks to @andrewdessler.com for leadership on our effort. See NPR story about our work: www.npr.org/2025/09/02/n... 16712
Prof William Ripple @williamripple.bsky.social · 29/08/2025It appears we have a coal problem. . . 2306
Prof William Ripple @williamripple.bsky.social · 25/08/2025Wildfires ravaging the EU have torched more than 1m hectares this year, marking 2025 as the worst year on record, a full month before the fire season ends. www.theguardian.com/world/2025/a...theguardian.comEU wildfires worst on record as burning season continuesData shows more than 1m hectares torched so far this year, with records also broken for CO2 and other air pollutants 25730
Prof William Ripple @williamripple.bsky.social · 04/08/2025Smoke on 8-4-25 from the wildfires in Canada. 67430
Prof William Ripple @williamripple.bsky.social · 04/08/2025Burning wildfires as of 8/4/25 have massive greenhouse gas emissions as part of a feedback loop. 38439
Prof William Ripple @williamripple.bsky.social · 02/08/2025Scientists can offer to work together on a response to the US government climate report. Just fill out the form below. 24231
Prof William Ripple @williamripple.bsky.social · 01/08/2025A new US Gov climate report minimizes risks of greenhouse gas emissions which is deeply troubling, downplays extreme weather, & misrepresents climate modeling. We need science-driven policy, not denial dressed as skepticism. Thanks to @michaelemann.bsky.social insideclimatenews.org/news/3007202...insideclimatenews.orgClimate Scientists Look to Fight Back Against DOE’s ‘Antiscientific,’ ‘Deceptive’ Climate Report - Inside Climate NewsClimate scientist Michael Mann called the report “a deeply misleading antiscientific narrative, built on deceptive arguments, misrepresented datasets, and distortion of actual scientific understanding... 195
Prof William Ripple @williamripple.bsky.social · 22/07/2025Our new paper out today: www.livescience.com/animals/land...livescience.comReturn of wolves to Yellowstone has led to a surge in aspen trees unseen for 80 yearsGray wolves were reintroduced in Yellowstone National Park in 1995 to help control the numbers of elk that were eating young trees, and it is finally paying off for quaking aspen. 412337
Prof William Ripple @williamripple.bsky.social · 15/07/2025Here is a copy of our most recent state of the climate report. We are on the brink of an irreversible climate disaster. This is a global emergency beyond any doubt. Much of the very fabric of life on Earth is imperiled. . . . . . doi.org/10.1093/bios...doi.orgThe 2024 state of the climate report: Perilous times on planet EarthWe are on the brink of an irreversible climate disaster. This is a global emergency beyond any doubt. Much of the very fabric of life on Earth is imperiled 13627
Prof William Ripple @williamripple.bsky.social · 13/07/2025Daniel Swaim makes a good point here. 1115