ATasmanian dairy is making headlines by supplying supermarkets with the world’s first branded milk produced by cows fed with a seaweed additive to reduce harmful methane emissions.

According to the United Nations, the livestock industry contributes to around 30% of global methane emissions. While seaweed and other feed additives can effectively cut down these emissions, their high costs have impeded widespread adoption. Since February, Ashgrove, a family-owned dairy in Tasmania, has been feeding a fifth of its 500 cows an oil containing seaweed extract that curtails methane released during digestion, as per co-owner Richard Bennett.

Eco-Milk is testing whether consumers are willing to pay more for environmentally friendly dairy products. A two-liter bottle is priced at A$5.50 ($3.67), twenty-five cents more than regular full cream milk. Bennett commented that sales are encouraging, but the company has yet to decide on scaling the project.