Lower methane emissions from ruminants		Increase concentrate feeds in diet of ruminant livestock
		Livestock breeding
		Reduce the number of ruminant livestock		Increase in milk yield per dairy cow
		Increase number of ruminant livestock		Convert arable land to extensive grassland
		Modification of rumen microbial population		Vaccination to reduce rumen methanogens
				Use of antibiotic ionophores in ruminants
				Use of natural plant extracts in ruminant diet