‘We are not in a position to control a cloud brightening experiment scientifically,’ says one critic of the idea

Geoengineering is a dirty word in most scientific circles. The consensus is that deliberate intervention in the Earth’s climatic system, for whatev(...)

Artist’s rendering of unit to remove CO2 from air. Any such machine must be able to run passively, “like a tree standing in the wind”, says Prof Klaus S Lackner, who has designed a prototype.

Artificial plants are one of this reporter’s biggest pet hates. Sitting in the waiting room of a dentist’s surgery, a fake fern strategically positio(...)