HealthSpeedy cannabis spit test could spot people driving while high Now that personal use of marijuana has been legalised in many parts of the US, police are looking for ways to stop people driving while high. A 3-minute test could help News
TechnologyBacteria made to turn sewage into clean water – and electricity A self-powered waste water treatment plant using microbes has just passed its biggest test, bringing household-level water recycling a step closer News