Denmark will tax livestock farmers for the greenhouse gases emitted by their cows, sheep, and pigs starting in 2030, becoming the first country to do so.
The tax targets a major source of methane emissions, one of the most potent gases contributing to global warming.
The Danish government aims to reduce greenhouse gas emissions by 70% from 1990 levels by 2030.
Methane, though less discussed than carbon dioxide, traps about 87 times more heat over a 20-year period.
A single cow can generate up to 200kg of methane annually, primarily through burping.
A typical Danish cow produces 6 metric tons (6.6 tons) of CO2 equivalent per year.
New Zealand had passed a similar law set to take effect in 2025, but it was repealed after heavy criticism and a change in government.