The Supreme Court is currently considering whether to halve the punitive damages levied against Exxon for its massive 1989 oil spill from the Exxon Valdez tanker, from the current $2.5 billion to something more like $1 billion. Exxon claims the higher number amounts to excessive punishment. According to the New York Times, the decision may come down to a tie with four justices on either side; Justice Alito is not participating because he owns Exxon Mobile stock. The Exxon Valdez disaster “caused a 3,000-square-mile oil slick and still affects Alaska’s fisheries after nearly 19 years.”