In Belgium at the European dairy summit in Brussels, the German professor Windisch from the Technical University of Munich stated that the production of a glass of oat drink theoretically also produces a glass of cow milk. This is due to the by-products of oat milk, which are not edible for humans but are edible for ruminants. He also stated that methane emissions from livestock are often exaggerated because methane has a half-life of only twelve years and is therefore broken down much faster than CO2. If there were no more ruminants, this would only save less than one percent of methane emissions, according to the professor.