Prince Charles has backed new face masks for cows that are designed to reduce the amount of methane they release when they burp and breathe.
London-based ZELP produced a mask to help with rising emissions largely due to methane produced by cattle. The unusual mask, worn on a cow's nose, neutralises methane it breathes out.
The methane travels through a catalyst and gets oxidised, so instead of releasing the greenhouse gas, it releases water vapour and CO2. ZELP claims "neutralizing methane emissions is the single fastest way to stop climate change".
