Another court ruling in the Michael Mann global warming case. It’s a setback for a conservative group.The Virginia Supreme Court has ruled that Mann’s emails are exempt from the Freedom of Information Act. The American Tradition Institute wanted to see the emails from Mann, a former UVA environmental sciences professor. The conservative group disputes Mann’s research that supports the carbon gas emmission theory behind global warming. The state supreme court agrees with a judge in Arlington who said Mann’s emails are propietary records because they deal with academic research.