Now the river keeps its own record
A monitor powered by the river it sits in, reading the water every ten minutes and seeing trouble three days out.
Glass a bird can see
A window is invisible to a bird. The new answer is a pattern etched into the glass itself, which the bird reads as solid and you barely notice at all.
The mines that warm the town above them
Gateshead dug coal for two centuries. Now the flooded old tunnels warm the town, cleanly, from below.
The nets that catch a cloud
In Chile's dry north, a farming community harvests its water straight out of the morning fog.
The Perth pair growing tomorrow's plastic in a seaweed tank
An ocean scientist and her cofounder ferment seaweed into little pearls that behave like plastic, then vanish like a leaf.
The seeds that think the lightning came
In Cairns, a Maiawali inventor and his cofounder wake seeds with gentle electricity, the way storms have for ten thousand years.
The satellites that smell smoke first
A new constellation is being built for one job only: finding wildfires while they are still small enough to stop.
The cargo ships that remembered the wind
After eight years at sea, the spinning sails on one bulk carrier have saved over a thousand tonnes of fuel, and they are still turning.
Mako, the robot planting a meadow underwater
Hand planting seagrass manages about five hectares a year. This machine is built for five hectares a day.
The Shanghai fuel made from thin air and water
A young company just broke ground on a factory whose ingredients are captured carbon dioxide and hydrogen split from water.
Crushed rock, young trees and 290 people with tape measures
Volunteers on a Welsh hillside spent four years measuring barcoded saplings, and produced a scientific first.
A river opened up again, 160 miles of it
Three dams gone, a river handed back to itself, and a rather clever gate at the very last barrier.
The machine that makes drinking water out of thin air
Two American neighbourhoods are about to drink water pulled straight out of the sky, using a Nobel winning material.
The concrete recipe that just passed its biggest test
A Paris development of 151 homes has been built entirely with a low carbon cement, and nobody on site had to change how they work.
The little vans bringing forgotten railways back to life
France's clever electric van switches from road to rail to wake up sleeping train lines.
The battery made of rust, iron and air
One hundred hours of stored power from the cheapest ingredients on Earth.
Perth's rubbish is now powering 55,000 homes
What cannot be recycled no longer goes to waste, or to landfill.
One train at sunset, seventy trucks off the road
Every grain train is a highway's worth of trucks that never left the depot.
Stockholm's flying ferry passed every test, now the world is queueing
It lifts above the water, halves the commute, and sips power.
The tree seed that scrubs plastic from drinking water
Crush a seed, clean a glass: nature's own water filter just aced its exam.
The solar panel that turns plastic rubbish into clean fuel
Cambridge chemists use sunlight to turn old plastic and water into clean hydrogen fuel.
The building material you can grow in a paddock
Klara Marosszeky has spent 25 years proving hemp and lime can build warm, breathing homes.
A clever new way to turn seawater into drinking water
A team at the University of Rochester has found a gentler way to desalinate the sea, powered by sunlight and leaving no toxic brine behind.