 So instead of going into the atmosphere, it's captured and sent in a pipeline about 20 miles to their ethanol plant. And that's where the methane is converted into biofuel to power vehicles. But environmental advocates worry methane digesters could lead to more cows and more pollution. Leslie Martinez is with the Leadership Council for Justice and Accountability. This is thousands of cows that are living next to people. A cow is producing waste and we are incentivizing this waste to be produced next to poor communities.