theSIGNAL ENVIRONMENT
10 November 2026
"What gets measured gets managed, but only if someone is willing to act on the measurement."
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Environment

Earth Is Trapping Heat Faster Than Ever Recorded

As delegates gather in Turkey for Cop31, the UN weather agency says the planet's energy imbalance has hit a record high.

In 1992, when world leaders signed the UN climate convention, carbon dioxide made up 356.42 parts per million of the atmosphere. Last year the figure was 426.8.

That gap, a rise of 53% since the Industrial Revolution began, is the backdrop to Cop31, which opens on Monday in the Turkish resort city of Antalya, and to a sobering update from the World Meteorological Organization (WMO). The agency reports that the difference between the solar energy Earth absorbs and the energy it sends back to space is now the largest since measurements began. The rate of increase has also sped up: ocean heat data suggest the imbalance grew by 0.3 watts per square metre each decade between 2001 and 2025, against only 0.

13 watts across the longer period from 1960. Because the oceans absorb about 90% of the excess heat, they bear the clearest signature. Sea surface temperatures reached monthly records, sea level is the highest ever recorded, and 2026 is expected to be the tenth consecutive year of record ocean heat. Surface readings tell a similar story.

From January to September, the global average was roughly 1.47C above the preindustrial level, and 2026 is on course to be among the four warmest years ever, which would make 2023 to 2026 the four hottest in the record. This is despite the year opening with La Niña conditions, which normally restrain global temperatures. Scientists warn that the accumulating heat will intensify heatwaves, droughts and tropical cyclones.

António Guterres, the UN secretary general, linked the data to an approaching El Niño and to unequal suffering.

Photo: Robert Lukeman / Unsplash
Delegates arrive in Antalya, Turkey, as the Cop31 climate summit opens against record heat data.
Discuss
  • The oceans absorb about 90% of excess heat. Why might that make ocean records more revealing than surface temperatures?
  • Guterres says those least responsible suffer first and worst. How should climate finance reflect that imbalance between cause and consequence?
  • Wildfire smoke in Indonesia sent thousands to treatment centres. Which climate impacts do you think reach ordinary people most directly?
Science

A Famous Linen Cloth Holds Coral DNA

Forty-six years after its fibers were sampled, the Shroud of Turin has yielded something unexpected: DNA from humans, bacteria, fungi, plants, animals and Mediterranean red coral. Researchers used PCR-free metagenomic sequencing, which reads genetic material from many species at once, on samples collected in 1978. The human DNA came from several maternal lineages, suggesting contact with diverse populations over centuries. Skin bacteria and salt-loving archaea also appeared.…
  • If a relic's DNA mixes many populations, what can it actually prove about origin?
Science

A One-in-Ten-Billion Decay Finally Appears

After four decades of searching, CERN's LHCb experiment has found evidence of a beauty-particle decay expected roughly once in ten billion cases: a Bd particle turning into two muons. The result matches Standard Model predictions, yet it matters because such rare processes are sensitive to particles too heavy for the Large Hadron Collider to create. If future measurements drift from theory, what unseen particle might be responsible?
  • If rare decays keep matching theory, how should physicists justify building ever larger colliders?
"
We have entered a new age of climate extremes.
António Guterres, UN Secretary General
EUROPE · Environment
Cop31: what is at stake at the UN climate summit and what can it achieve?
ASIA · Environment
Cop31 will expose the conflicts and contradictions of the world’s fossil fuel reliance
AMERICAS · Environment
Revealed: how a UK firm is spearheading growth in trade of US fracked ethane
GLOBAL · Environment
Cop31 must deliver climate progress that people can see is real, host says
theSIGNAL IN THE LAB
1VOCABULARY
imbalancepreindustrial
restrainsignatureconsecutive
accumulatingmetagenomic
2GRAMMAR FOCUS
Passive voice — full range (simple, continuous, perfect, modal passive)
Form the passive with a suitable tense of 'be' plus the past participle, and use it when the action or the thing affected matters more than who performs it. Continuous passives use 'being', perfect passives use 'been', and modal passives use a modal plus 'be' or 'have been'.
is · been · being · was · were · be · have
  1. The Shroud of Turin's fibers sampled in 1978, but the DNA analysis was only published decades later.
  2. Around 90% of the excess heat in the climate system absorbed by the oceans.
  3. Delegates arriving in Antalya say that the final text is still negotiated behind closed doors.
  4. The Earth's energy imbalance has measured more precisely since satellite and ocean-heat records began.
  5. If future measurements differ from the Standard Model, an unseen heavy particle might responsible.
  6. The rare Bd decay into two muons was predicted to seen only about once in ten billion cases.
3COLLOCATIONS
Match the verb on the left with the noun phrase it best collocates with on the right.
  1. to bear
  2. to set
  3. to restrain
  4. to yield
  5. to drift from
4CRITICAL THINKING
Both the shroud study and the particle-decay result depend on advanced techniques that reveal information no one could access decades ago. How far should we trust findings that rely on new methods applied to old samples or old theories, and what safeguards would make you more confident in them? Consider also who decides which of these discoveries deserve funding and public attention.
5CREATIVE · HEADLINES
Write a headline for the top story in each of the following styles. One line each, no explanation:
  • TABLOID NEWSPAPER
  • LUXURY MAGAZINE
  • ACTIVIST BLOG
6WRITING
Imagine you are a delegate arriving at Cop31 in Antalya. Write a short diary entry (120-150 words) describing your hopes and fears on the eve of the summit, referring to at least two facts from the WMO report.
7DEGREES OF EXTREMITY
Complete each ladder from mild to strong.
  • worrying→→
  • noticeable→→
  • uncomfortable→→
  • unusual→→
  • uncommon→→
  • surprising→→
8SPEAKING
  1. Would you trust a scientific finding more if it confirmed existing theory or overturned it?
  2. Why do you think people lose interest in alarming news when it keeps repeating?
  3. Is it worth spending decades searching for something that may never matter in daily life?
  4. Should historic relics be tested scientifically even if the results challenge people's beliefs?