Answer :
answer: agriculture is the largest source for methane gas
naturally speaking, wetlands are the biggest source of methane gas
overall, the largest sources of methane gas emissions from human activities in the u.s. are from oil and gas systems, livestock enteric fermentation, landfills, manure management, and coal mining
naturally speaking, wetlands are the biggest source of methane gas
overall, the largest sources of methane gas emissions from human activities in the u.s. are from oil and gas systems, livestock enteric fermentation, landfills, manure management, and coal mining