Disappointed by the lack of concrete action at September’s UN Climate Action Summit, the mayors of some of the world’s biggest cities are taking matters into their own hands. The C40 group of mayors — who represent 94 cities, more than 700 million people and one quarter of the global economy — announced their support...Read More

The “war on plastic” has opened up a major new front, with Unilever announcing Monday it intends to halve its use of virgin plastic and collect and process more used plastic packaging than it sells by 2025. The consumer goods giant confirmed the new targets Monday as part of a wide-ranging new plan to support...Read More

When Bertrand Piccard proposed circumnavigating the globe in a solar-powered airplane, the world’s leading aviation experts told him it was a pipe dream. That’s when the former Swiss Air Force fighter pilot turned to a shipyard where engineers said they could build a fuel-free airplane as light as Piccard desired. In 2016, Piccard and his...Read More