They were once abundant, in our hairsprays, bug sprays, and refrigerators. And then scientists figured out these substances ripped a hole in the ozone layer, leading to a 1987 plan to phase them out that over time would be agreed to by every country in the world. More than three decades later, researchers have made a new discovery. Ozone-depleting substances do more than just gnaw at Earth's pr...

Technology to stop ads running in stories about terrorism, for example, is blocking them from ‘safe’ stories too UK newspaper and magazine publishers lost almost £170m in digital revenue last year as technology designed to stop advertisements from appearing next to hard-hitting content, such as shootings and terrorism, also inadvertently blocked them from appearing in some of the most popular s...