"Study finds use of CT scans has nearly tripled in the last 15 years. Such radiation exposure increases the risk of cancer."

"The Rev. Thomas Long doesn't have neighbors on Montrose Avenue anymore. Everyone is gone."

"Diesel engine fumes can cause lung cancer and belong in the same potentially deadly category as asbestos, arsenic and mustard gas, World Health Organisation (WHO) experts said on Tuesday."

"Climate change will make wildfires in the West, like those now raging in parts of Colorado and New Mexico, more frequent over the next 30 years, researchers reported on Tuesday."

"Secretary of State Hillary Clinton will lead a delegation of officials to the United Nation's sustainability conference in Rio de Janeiro from June 20-22, the State Department said Tuesday, signaling a stronger U.S. commitment to the summit. The announcement comes after U.N. Secretary General Ban Ki-moon in April called on U.S. President Barack Obama to attend the conference and to take a more active role in global efforts to curb climate change."

"Federal health and environmental agencies are investigating whether Range Resources Inc.'s Yeager Marcellus Shale gas drilling site in Washington County caused toxic air and groundwater pollution that damaged the health of nearby residents."

"A new US-led study, featuring research by Tasmanian scientists, has concluded that warming ocean temperatures over the past 50 years are largely a man-made phenomenon."

"Twenty-one state legislators from 10 states are urging the American Chemistry Council, a chemical industry trade association, to expel three member companies for unethical behavior. As ACC members, the companies -- Albemarle, Chemtura, and ICL Industrial Products--must conform to ACC’s Responsible Care program, which, according to a June 4 letter to ACC from the legislators, the companies do not."

"Whether or not fishermen should be permitted to throw away healthy fish at sea instead of selling them to consumers will come to a head at a crunch meeting of Europe's fisheries ministers on Tuesday."