Nonrenewable Energy Cost and Greenhouse Gas Emissions of a “Pig-Biogas-Fish” System in China

Table 6

GE of the conventional animal husbandry system.

	Direct GHG; (kg CO2-eq/yr)	GEin; (kg CO2-eq/yr)	GE; (kg CO2-eq/yr)
Pigsty	2.76𝐸+02	1.76𝐸+03	2.04𝐸+03
Farmers	0.00𝐸+00	9.14𝐸+02	9.14𝐸+02
Fishpond	1.69𝐸+03	4.95𝐸+03	6.64𝐸+03
Total	1.97𝐸+03	7.62𝐸+03	9.59𝐸+03
Ratio	20.50%	79.50%	100.00%