The abandoned, unexploded ordnance, combined with oil from leaks or deliberately flooded trenches, has left a hazardous environment for rehabilitation workers to operate in.

CNN: November 12, 2012 -- Updated 1223 GMT (2023 HKT)

O'Leary, who had been described as a horse "hoarder, " admitted six charges of causing unnecessary suffering and two of keeping horses in a hazardous environment.

BBC: OAP jailed for neglecting horses

If we are talking about a hazardous environment such as a nuclear power plant, the damage caused by a single, un-networked sensor could be catastrophic, for two reasons: first the sensor failure itself could be the problem.

FORBES: How Sensor Networks Add to Context

But as seismologist Horst Langer says, Etna's changing landscape is a hazardous working environment.

CNN: Keeping track of Etna's pulse

One example is the nanolithography used in chip making, which eliminates process chemicals that are hazardous to the environment.

FORBES: Nanotech Vs. The Green Gang

Even biodegradable waste can be potentially hazardous in a landfill environment.

CNN: All about plastic

The second reading agreement includes a clampdown on the illegal shipment of electronic waste to countries where it may be processed in conditions hazardous to workers and the environment.

BBC: WEEE Directive revisions

We will seek reauthorization and expanded funding for the Superfund program to continue cleaning up hazardous waste sites which threaten human health and the environment.

CNN: State of the Union Address