"Coal ash, a byproduct of coal-fired power plants, which the federal government is about to start regulating, is sloshing and settling in 10 ponds around Alabama that eventually could store more than 81 million cubic yards of the toxic stuff."

After a tornado largely destroyed Greensburg, Kansas, three years ago, the town has made a mark for itself by rebuilding a sustainable infrastructure from the ground up.

Canada's asbestos industry continues to push the message that asbestos is not toxic. Health experts think the truth will eventually prevail.

"The University of Virginia has hired a law firm to explore its options in responding to a demand by state Attorney General Ken Cuccinelli that UVa turn over documents and correspondence related to a former climatology researcher."

"A new analysis of U.S. health data links children's attention-deficit disorder with exposure to common pesticides used on fruits and vegetables."

"More than half of the students tested in Detroit Public Schools have a history of lead poisoning, which affects brain function for life, according to data compiled by city health and education officials."

"A landmark study will include some evidence that those who regularly hold long conversations on handsets are at increased risk of developing potentially fatal brain tumours."

"The water supply of more than 2 million Californians has been exposed to harmful levels of nitrates over the past 15 years -- a time marked by lax regulatory efforts to contain the colorless and odorless contaminant, a California Watch investigation has found."

"Oil giant BP succeeded Sunday in connecting a mile-long pipe to help capture what it hopes will be most of the oil flowing from a damaged well into the Gulf of Mexico -- 'an important step' toward capping the massive spill, the company said, but not a complete solution."

In a rush to complete the well it was drilling with the Deepwater Horizon, BP and other companies pushed ahead to complete the well despite multiple warnings that conditions were unsafe. CBS Interviews with explosion survivor Mike Williams and Berkeley engineering professor Bob Bea bring to light new information not yet available to the panels investigating the spill. At least five congressional hearings are scheduled on the spill this week.