TECH: This gadget will keep track of your farts

Metro.usTECH: This gadget will keep track of your fartsMetro.usWe've got wearables to monitor our heart rate, sleep patterns - and now, eh-hem, our farts. The CH4 wearable and app helps you work out which food gives you flatulence. The gadget, named after the chemical formula for odoriferous methane - sits in your ...