Methane-reducing seaweed asparagopsis up for sale after years of research

Trials show methane emissions from cattle can be reduced significantly with just a small amount of the native seaweed. (Supplied: CSIRO)

After years of frantic research and fast-tracked commercial licensing, cattle feedlots can now buy asparagopsis, a native Australian seaweed touted to reduce methane emissions by "90 to 95 per cent" when fed to cows and sheep.