Clean energy advocates are urging the Maryland General Assembly to close a loophole in the state's renewable energy law, which allows paper mills to burn a wood waste called "black liquor" to collect millions of dollars in subsidies from electricity rate payers.
In 2013, 45 percent of the renewable fuel credits claimed under the state's 10-year-old Renewable Portfolio Standard went not to support wind or solar power -- but to paper factories burning this high-pollution fuel.