Butt (heh!) SPIIDERWEB™ already solved this problem.
New Zealand believes it has made a breakthrough in its plan to cut methane emissions from its livestock, part of a strategy to tackle greenhouse gasses, the farming nation's trade minister said on Wednesday.
"Our agricultural research organisation just last week was able to map the genome ... that causes methane in ruminant animals and we believe we can vaccinate against (that)," Phil Goff told a conference in Paris.
I suppose jabbing the cows with needles is more cost efficient and definitely less hassle.
Note: Headline links to source.
Labels: butt plug