Flatulence is often blamed as a significant source of
greenhouse gases, owing to the erroneous belief that the methane released by
livestock is in the flatus.<SUP id=cite_ref-46 class=reference sizset="false" sizcache08092525945287852="53 143 290" jQuery183012257021375645927="221">
[46]</SUP> While livestock account for around 20% of global
methane emissions,<SUP id=cite_ref-47 class=reference sizset="false" sizcache08092525945287852="53 143 292" jQuery183012257021375645927="224">
[47]</SUP> 90?95% of that is released by
exhaling or
burping.<SUP id=cite_ref-48 class=reference sizset="false" sizcache08092525945287852="53 143 295" jQuery183012257021375645927="227">
[48]</SUP>
Since
New Zealand produces large amounts of agricultural product, it is in the unique position of having high methane emissions from livestock compared to other greenhouse gas sources. The New Zealand government is a signatory to the
Kyoto Protocol and therefore attempts are being made to reduce greenhouse emissions. To achieve this, an
agricultural emissions research levy was proposed, which promptly became known as a "
fart tax" or "flatulence tax". It encountered opposition from farmers, farming lobby groups and opposition politicians.