Pulp mills may be getting back on the black liquor gravy train.
Paper and pulp makers, including a number of mills in southwest Alabama, collected $8 billion or more last year in federal cash and tax credits by doing what they've done for decades -- burning the carbon-rich leftovers from the pulp-making process to fuel their mills.
The liquid, known as black liquor, was declared eligible for alternative fuel tax credits if mill operators mixed in a little diesel fuel.
