From Malcolm Bacchus, London, UK
Donna Lu reports new lightweight materials made of gallium, indium and glass bubbles (14 March, p 12). In the same issue, Layal Liverpool describes a gold-coated fabric that can emit light in different patterns (p 18). These seem remarkable from a technological point of view, but I wonder how recyclable such materials would be? If they aren’t, should we be developing them in the first place?
