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Researchers from the Illinois Institute of Technology, University of Texas at Austin and Ecole des Ingénieurs de la Ville de Paris said the problem lies in the process of creating 3-D printed material.

3-D printing clearly has it's benefits, but a recent study has revealed a major concern. Read more»

A new study from the University of Southern California says marijuana use may increase the risk of testicular cancer. Read more»

A bus in Guatemala spews a black cloud of diesel exhaust fumes.

Diesel engine exhaust is “carcinogenic to humans,” an international health body declared Tuesday, bolstering the findings of a controversial study published recently in the United States. Read more»

An aerial view of drilling activity in the Pinedale Anticline natural gas field of Wyoming.

In a first, federal environment officials Thursday scientifically linked underground water pollution with hydraulic fracturing, concluding that contaminants found in central Wyoming likely were caused by the gas drilling process. Read more»

The Clean Air Act “watch list” is secret no more. Just days after iWatch News, NPR and TucsonSentinel.com reported that the EPA maintains an internal list that includes serious or chronic violators of air pollution laws that have not been subject to timely enforcement, the agency posted the list on its website. Read more»

The Asarco copper smelter looms over Hayden.

In some Hayden families, generations claim to have suffered ill effects from air pollution from the town's copper smelter. Deaths from cancer are common. Now the feds are moving against Asarco when the state wouldn't, which could mean millions in fines for the copper giant. (with video) Read more»

The smokestacks from Tonawanda Coke Corp. overlook a playground in Tonawanda, N.Y. Residents of the town near Buffalo say they've been breathing in toxic emissions from the plant.

It took five years of prodding before state regulators formally blamed Tonawanda Coke for the high levels of benzene and moved aggressively to enforce the Clean Air Act. Finally in 2009 the state, together with the U.S. Environmental Protection Agency, swooped down on the plant for a week-long surprise inspection. Read more»

In policing the nation’s polluters, criminal prosecution is the government’s most potent weapon. Congress passed legislation 21 years ago to strengthen criminal enforcement and encourage the EPA and the Justice Department to go after the worst violators of air pollution laws. But an investigation by the Center for Public Integrity’s iWatch News shows the extent to which this vision has gone unrealized. Read more»

A study published in July suggests that phthalates and other chemical ingredients in tattoo ink may be responsible for allergic reactions and infections. More concerning, these newly found chemicals raise unanswered questions about more serious, long-term risks such as skin cancer. Read more»

Tons of imported fish laced with chemicals banned from the U.S. food supply, including carcinogens, are routinely showing up in this country and, state officials say, winding up on American dinner plates. Read more»