Globally, human excreta are a huge untapped source of nutrients. Now, a new perspective paper makes the case that biochar could help to unlock it. The PNAS paper shows that human waste contains over ...

Biochar might sound like a fine dining special, but it's actually a promising solution to help farmers meet their fertilizer needs. The substance, a stable form of carbon similar to charcoal, is made ...

Feeding astronauts on Mars without relying on supplies from Earth is a major challenge. A surprising avenue is emerging, however: transforming sterile soil into fertile land thanks... to human waste.