Scientists have invented a magical gadget that sucks the ink off printer paper so each sheet can be used 10 times over. They aim to cut the amount of planet-heating carbon dioxide (CO2) emissions from the paper and pulp industry by reducing demand for office paper.

The dam at Mt Keith is a leading global example of “mineral carbonation”, a chemical reaction triggered when the mine’s magnesium-rich wastes interact with air, leading to carbon dioxide being sucked out of the atmosphere and locked away in secure mineral crystals.