Turning our waste paper in to biofuel could replace over 5% of global petrol consumption.
Constructing extremely small lenses can help overcome Abbe's diffraction limit, which limits seeing very small objects with regular light.
Researchers in Argentina have developed a new approach to testing food packaging for trace amounts of the toxic heavy metal cadmium.
Indiscriminately accepting charitable donations of old electronic equipment might not be worth the cost of increased waste.
