Table 1.

Yearly production of methane from livestock in Denmark.

Source	Livestock category	1000 tons methane/year
Digestive system	Dairy cows	72
	Cattle	114
	Small ruminants	1,4
	Horses	3,7
	Swine	14
	Total livestock	133
Livestock waste	Cattle	12
	Swine	33
	Other livestock	2
	Total livestock	47

In total, livestock produce 133 × 1000 tons of methane (CH₄) every year. Cattle represent 86% of this production, and small ruminants represent just 1%. Source: [3].