As Chile plans to ramp up lithium mining - a mineral crucial to the EV industry - Ione Wells explores if it can be done more sustainably. In northern Sweden, Adrienne Murray visits a plant aiming to make steel production greener. Plus, Alasdair Keane meets the marine robot cleaning up litter, and Jacqui Wakefield checks out the Kenyan start-up using plastic waste for 3D printing.
