Posted in Web UK carbon dioxide shortage could force farmers to cull … November 9, 2021 UK carbon dioxide shortage could force farmers to cull pigs. This article is more than 1 month old. Soaring energy prices slow production of gas used to stun animals before slaughter in abattoirs. https://www.theguardian.com/environment/2021/sep/17/warnings-carbon-dioxide-shortage-could-force-farmers-to-cull-pigs