Speaker, Consultant, Expert, Sciences Sociales, environnementales, climatiques, écologiques, RSE, Sustainability, Stratégie, Executive Coaching, bilingue.
Paris (France)
Joined May 2011
- Tweets25.3K
- Following2K
- Followers1.7K
- Likes4K
Calvo Constant retweeted
We are approaching the warmest global surface air temperature anomaly on record (1.15C on Nov 18 2023) as record El Niño approaches peak: pulse.climate.copernicus.eu/
Calvo Constant retweeted
Excited to announce my next book, #ComingBacktoEarth, due out in April 2028 from @BasicBooks/@HachetteUS/@Public_Affairs publishing:
Calvo Constant retweeted
We just published the 2026 State of the Climate Report. Of 16 planetary vital signs spanning greenhouse gas concentrations, temperatures, the oceans, ice, energy balance, and wildfire, 7 (44%) are currently at record extremes. Read report here: doi.org/10.1093/biosci/biag1…
Calvo Constant retweeted
Scientists worldwide: We invite you to sign the World Scientists’ Warning to Humanity: A Third Notice. 35 years after the first warning, we now declare a planetary emergency. If you are a scientist, please read, sign, and share. Go to this link: docs.google.com/forms/d/e/1F…
Calvo Constant retweeted
The Scientist's Warning is a film about a researcher who started a movement of scientists to turn knowledge into action- a story of scientists all over the world awakening to the need to become advocates for the fate of the planet & humanity.
youtu.be/byXGCPo-80w via @YouTube
Calvo Constant retweeted
🌍 “This is no longer a warning for the future; it is a diagnosis of the present.” Our 2026 State of the Climate report finds 7 of 16 planetary vital signs at record extremes. The planetary emergency is already here.
doi.org/10.1093/biosci/biag1…
Calvo Constant retweeted
Today, most greenhouse gas emissions can be traced to five key sectors:
⚡ Energy
🌽 Agriculture
🏭 Industrial processes
🗑️ Waste
🌲 Land use, land-use change and forestry
#ClimateWatch breaks it down: go.wri.org/ghg-charts-tw
Calvo Constant retweeted
Artificial intelligence is changing education. But what does that mean for teachers?
@UNESCO's AI Competency Framework for Teachers sets out 15 competencies across five key areas, including AI ethics, pedagogy and a human-centred approach.
The goal? To help teachers harness AI while keeping human agency and teachers’ rights at the heart of education.
📘 unesco.org/en/articles/ai-co… #WorldTeachersDay
Calvo Constant retweeted
Plastic pollution threatens human health, affects food and water safety, burdens economic activities, and contributes to climate change.
🌊 Our Issues Brief explains how we can tackle #PlasticPollution.
➡️ bit.ly/3nHUxTc @IUCN_Plastics
Calvo Constant retweeted
🤝 The #ParisAgreement was never designed to solve climate change on its own.
But it remains critical for setting global ambition, shaping national climate action and tracking progress. Here’s what Paris can and cannot deliver: bit.ly/46g8lXU
Calvo Constant retweeted
Not a single indicator on the Global Goals for gender equality is on track to be met by 2030, according to @UN_Women Gender Snapshot 2026.
Investing in SDG5 is the fastest path to the #Agenda2030’s promise of equal power for all.
buff.ly/7lkY5d7
#GenderEquality
Calvo Constant retweeted
Today, the Empowering Consumers for the Green Transition Directive starts applying across the EU.
Making greener choices will now be easier as these new rules will strengthen the protection against #greenwashing
More:
lnkd.in/gdyuB_5P
Calvo Constant retweeted
Global average sea surface temperature anomaly (departure from the climatological seasonal average) is poised to set a new record, thanks to steady warming combined with a monster El Niño event: pulse.climate.copernicus.eu/
Calvo Constant retweeted
As work begins on the next U.N. climate assessment, fears are growing that the Trump administration could meddle with critical U.S. climate data.
In response, scientists are preparing to transfer vast troves of that data to repositories in Germany.
e360.yale.edu/features/germa…
Calvo Constant retweeted
A landfill in Chile. An oil well in Turkmenistan. A coal mine in China.
These are among the world’s largest sources of planet-warming methane, as identified in an analysis by @MethaneData.
But how quickly are countries taking action?
This article explains: unep.org/technical-highlight…
Calvo Constant retweeted
"In Hottest Summer on Record, 2 in 3 Americans Say Climate Change Is Increasing Heat-Related Illnesses" via @APPCPenn: annenbergpublicpolicycenter.…
Calvo Constant retweeted
We (@PeterHotez and I) anticipated this assault on climate action as a logical extension of the #Project2025 agenda in our book #ScienceUnderSiege published just over a year ago now
nytimes.com/2026/09/13/clima…
Calvo Constant retweeted
Brown sky = bad.
Blue sky = good.
Air pollution seems simple, right?
Look a little closer and things get much more complicated.
From PM2.5 and smog to AQI and super pollutants, brush up on the key terms ahead of #CleanAirDay to better understand the air you breathe: bit.ly/4qY1And
Calvo Constant retweeted
Why are climate scientists not surprised about mountains being destabilized by glacier melt and permafrost thaw?
Because they have long predicted that as a result of #globalheating.
theguardian.com/world/2026/a…
Calvo Constant retweeted
Chances are you know the climate is changing, and that means trouble.
From rising emissions to melting permafrost and economic risks, these 7 graphs break down the climate crisis today.
Explore UNEP data and why the world must act #NowForClimate: unep.org/news-and-stories/st…
