The UK’s Countryfile TV programme has featured research by the Centre for Agroecology, Water and Resilience (CAWR) at Coventry University, which is using farm-based trials to study whether feeding biochar (a form of charcoal) to cattle can reduce their emissions of methane and ammonia.
Readers in the UK can view the video on BBC iPlayer here (the relevant segment is from 36:30 until 45:15). Read more about the project on the CAWR website here and view results from the ongoing trials on the Innovative Farmers website here. See also the Foodsource resource How far could changes in production practices reduce GHG emissions? and the FCRN report Grazed and Confused?