Which action can help in reducing methane emissions?

Reducing livestock farming is an effective action for lowering methane emissions because livestock, particularly ruminants like cows and sheep, produce significant amounts of methane during digestion through a process called enteric fermentation. This greenhouse gas is a potent contributor to climate change, being much more effective at trapping heat in the atmosphere than carbon dioxide over a short time frame.

By decreasing the number of livestock, the overall production of methane is diminished. This reduction can also be complemented by improved farming practices or alternative sources of protein that create fewer emissions, further contributing to environmental sustainability. The other options would either contribute to more methane production or are unrelated to methane emissions in the context of livestock.