Denmark has become the first country to pass a tax on animal flatulence and belches, known as 'methane emissions', in an effort to protect the environment. The tax, which will be implemented in 2030, will initially cost farmers 300 Danish kroner (around $43) per ton of carbon dioxide equivalent, rising to 750 kroner (around $106) by 2035. However, farmers will receive a 60% rebate due to the lack of technology to reduce flatulence. The rebate will increase for farmers who reduce methane production through measures such as sending pig manure to the gas grid. The tax is aimed at addressing environmental concerns from agriculture, which is a significant contributor to pollution in Denmark, particularly due to its large cow and pig populations. The government also plans to convert 15% of farmland into forests and natural habitats, and plant a billion trees on farmland, at a cost of $6.1 billion.