When it comes to environmental law, Supreme Court nominee Elena Kagan's positions are largely a mystery.

"Federal and state investigators began closed-door interviews Monday in their probe of the Upper Big Branch Mine disaster, as a federal judge considered a suit filed by the United Mine Workers and two disaster victims who want the questioning done during a public hearing."

"Businesses with significant stakes in the outcome of climate and energy legislation ramped up lobbying spending earlier this year as they worked to shape the Senate bill scheduled to be unveiled this week."

"The sinking of the Deepwater Horizon drilling rig, which triggered the spill spewing oil into the Gulf of Mexico, caught the energy world by surprise. The operator, Transocean Ltd., is a giant in the brave new world of drilling for oil in deep waters far offshore. It had been honored by regulators for its safety record. The very day of the blast on the rig, executives were aboard celebrating its seven straight years free of serious accidents."

"When the Deepwater Horizon rig exploded and oil started gushing into the Gulf of Mexico, neither the oil companies nor their watchdogs in the Interior Department were ready."

"The oil industry, not the federal agency that regulates it, plays a crucial role in writing the safety and environmental rules for offshore drilling, a role that critics say reflects cozy ties between an industry and its regulators that need to be snapped."

"It's the latest twist in American college ratings: How green is your campus? Dormitories at Chico State hold competitions to see which one can save the most energy, with the winning students awarded a pizza party."

A team of scientists at the National Oceanic and Atmospheric administration tries to sort out the various causes of hurricanes and heat waves -- to see whether the fingerprints of man-made climate change can be found.

"A cancer report that concludes Americans are under constant assault from carcinogenic agents has heartened activists, who hope that finally government and policymakers will pay attention to their concerns. But the report from the President's Cancer Panel on Thursday has underwhelmed most mainstream cancer experts and drawn only a puzzled response from the White House."

"A commission run jointly by Texas and Vermont, with a membership made up mostly of Gov. Rick Perry's appointees, could decide this summer to make Texas the potential resting place for radioactive waste from 36 states."