theSIGNAL ENVIRONMENT
28 July 2026
"We do not inherit the earth from our ancestors; we borrow it from our children."
Environment

Ten Days of Rain That Erased Everything

From Afghanistan's mountain villages to Bangladesh's coastal plains, a season of extreme rainfall is destroying homes, crops, and the quiet certainty that next year will be better.

In the remote district of Dur Baba in eastern Afghanistan, construction worker Anar Gul watched ten days and ten nights of unbroken rain dissolve the stone-and-mud walls his community had always called home. His kitchen collapsed. His neighbour, Sayed Afsar Sadat, lost a large section of his house entirely. "Rains like this are coming heavier and earlier each year," Sadat said.

"They are destroying the roads and washing away our crops." Last week alone, flash floods across Afghanistan killed at least 31 people and left hundreds more unaccounted for — a toll that has become almost routine across the wider region. The same weather system stretched far beyond Afghanistan's borders. In Bangladesh, the port city of Chattogram recorded a staggering 412.

3 mm of rainfall in a single 24-hour period in early July — a national record. That deluge sent floodwaters surging through the Banshkhali district, where Jesmin Akter lived beside a canal with her six children. Overnight, the family lost their poultry, their paddy field, their repaired house, and every possession inside it: school bags, books, clothes, kitchen pots. Akter carried her children through chest-deep water to her mother's house, where the family sheltered in overcrowded conditions for more than a week.

India and Pakistan reported similarly erratic, sudden downpours in the same period, suggesting a pattern rather than a coincidence. Weeks later, Akter's family has returned to the ruins.

Photo: Wes Warren / Unsplash
Rescue workers inspect flood-damaged buildings in Afghanistan's eastern province of Nuristan after days of torrential rain.
Discuss
  • What does the flooding in both Afghanistan and Bangladesh suggest about the global reach of climate change?
  • Why might mud-and-stone houses in Dur Baba be particularly vulnerable to heavy rainfall, and what alternatives exist?
  • Jesmin Akter's house had been repaired just months before it was destroyed again. Should aid focus on rebuilding or relocating vulnerable communities?
Science

500,000-Year-Old Bone Rewrites Tool History

A triangular fragment of elephant bone, just 11 centimetres long, sat unrecognised in a collection for three decades before scientists at UCL and London's Natural History Museum identified it as Europe's oldest known bone tool — roughly 500,000 years old. Recovered in southern England and likely crafted by Homo heidelbergensis or early Neanderthals, the dense cortical bone functioned not as a blunt weapon but as a precision instrument for resharpening worn stone handaxes. 3D scans and electron microscopy revealed telltale impact notches with flint fragments still embedded inside them.…
  • Does one refined tool prove sophisticated thinking, or could the evidence suggest otherwise?
Environment

Forever Chemical Hides Inside "Green" Cooling

When Google and other tech giants promote two-phase datacenter cooling as a water-saving solution, they rarely mention what replaces the water: a PFAS "forever chemical" gas linked to cancer, liver disease, and birth defects. Now a coalition of 17 environmental groups is urging the EPA to reject Chemours' application to fast-track approval of Opteon 2P50, a new PFAS refrigerant. Earthjustice argues the company used flawed science to downplay both its toxicity and its climate impact. The application is also the first to invoke Trump's executive order demanding expedited EPA review of datacenter chemicals — a process critics say is legally questionable.…
  • Should tech companies be required to publicly disclose every chemical used in their datacenters?
"
Rains like this are coming heavier and earlier each year, they are destroying the roads and washing away our crops.
Sayed Afsar Sadat, resident of Dur Baba district, eastern Afghanistan
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theSIGNAL IN THE LAB
1VOCABULARY
unaccounted fordeluge
erraticfast-trackaccumulate
corticaltelltale
2GRAMMAR FOCUS
Causative have/get — have something done
Use 'have/get + object + past participle' to describe arranging for someone else to do something for you. The subject does not perform the action themselves.
repaired · analysed · tested · rebuilt · scanned · approved · reviewed
  1. Jesmin Akter had her house only months before the floods destroyed it completely.
  2. Scientists at UCL got the ancient bone fragment using high-resolution electron microscopy.
  3. Chemours is trying to have its new PFAS refrigerant by the EPA under an expedited process.
  4. After the flash floods in Afghanistan, many families need to have their roads before winter arrives.
  5. Researchers had the bone's surface with 3D technology, revealing impact notches containing flint fragments.
  6. Environmental groups want the EPA to have Chemours' flawed scientific data by independent experts.
3DEPENDENT PREPOSITIONS
Complete each phrase with the correct preposition. All from today's articles.
  1. The floods killed at least 31 people and left hundreds more unaccounted ___
  2. The family sheltered ___ overcrowded conditions for more than a week.
  3. PFAS compounds accumulate ___ bodies and ecosystems across every continent.
  4. Environmental groups are urging the EPA to reject the application ___ fast-track approval.
  5. The bone sat unrecognised ___ a collection for three decades.
4CRITICAL THINKING
The article on datacenter cooling reveals that a solution marketed as environmentally friendly may carry serious hidden risks — a pattern sometimes called 'greenwashing'. How should regulators and consumers evaluate environmental claims made by large corporations, and who should bear responsibility when those claims prove misleading?
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
The 500,000-year-old bone tool and the flooding in Afghanistan and Bangladesh both involve objects being shaped or destroyed by forces beyond human control. Using evidence from at least two of today's articles, write a short paragraph exploring what fragility and resilience mean across very different contexts.
7DEGREES OF EXTREMITY
Complete each ladder from mild to strong.
  • damp
  • unusual
  • concerned
  • worn
  • uncomfortable
  • questionable
8SPEAKING
  1. Should governments prioritise flood prediction systems over post-disaster aid?
  2. Can PFAS chemicals ever be considered acceptable in green technology?
  3. Does the bone tool discovery change how you view early human intelligence?
  4. Who bears greater responsibility: governments, corporations, or individuals?