This means that while the water from these pipes or the bore wells may look clean, it can be hazardous to drink.
The satellite is likely to burn up during reentry, but there's concern that it could contain hydrazine fuel, which may be hazardous to people on the ground.
In fact, more care can be hazardous to your health.
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Extremophiles comprise principally bacteria, which have the remarkable ability to thrive in conditions that would be hazardous to other lifeforms - extremes of temperature, radiation, salinity, and metal toxicity.
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The problem is that the intensity of the radio waves needed to charge mobile phones and laptop computers over long distances might be hazardous to human health, and regulators would be unlikely to approve.
Also, spotting unwanted visitors with lights on their cars is at least doubly difficult with the Targa roof open, and that could be truly hazardous to your Porsche driving pleasure.
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.
These innovative solutions entail reusing most of the water to frack additional wells so that ultimately, contaminated materials are reduced to a tiny fraction by volume so that it can be safely delivered to hazardous waste disposal facilities.
River levels could also rise and driving conditions are likely to be hazardous.
Clearly, the stock market is overextended on a short-term basis, and though it could still go higher over the near term, chasing it is likely to be hazardous.
Chasing stocks higher is likely to be hazardous, and with better entry points likely coming in the near term, patience will be key for investors and traders in the week ahead.
"The problem is kimchi is not supposed to be hazardous food because the kimchi has acidity below 4.6, " said Chongwon K. Cho, a sanitation consultant for restaurants who earlier worked for the health department.
There didn't appear to be any hazardous-material crews, and no neighbors were evacuated.
The chart of the iShares MSCI All Peru Index Fund ( EPU) is a good example of how hazardous it can be to invest in single-country funds without using appropriate risk controls.
The RAC is advising drivers to be prepared for hazardous driving conditions over the next few days.
Road conditions across the region were said to be "particularly hazardous".
"This bagged produce, whether it's lettuce or spinach or melons, is what I consider to be a potentially hazardous food, " says Michael Doyle, a microbiologist who heads the food safety center at the University of Georgia.
Before the vessel could be transported to its new home, it had to be cleared of all military equipment, undergo an inspection for hazardous materials and pass environmental regulations in the United States and the Cayman Islands.
It would be "premature to conclude that migraine has hazardous effects on the brain, " he writes.
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However, the odd thing is that, despite the success of efforts so far, and the likely success of future efforts, there is no official plan in place for dealing with any hazardous asteroid that is found to be on a collision course with Earth.
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But failing to meet their pledge would be much more hazardous.
Yellow warnings advising the public to "be aware" of frozen conditions and hazardous roads in eastern England and south-east Scotland have been issued by the Met Office.
The earth and the water flowing through it in contact with these hazardous chemicals from 1 foot to 20000 feet down will be poisoned forever.
By tuning the quantum cascade laser and measuring how much of the infra-red radiation is absorbed on its way to a detector, hazardous gases in between can be identified.
The US space agency's (Nasa) Near Earth Object programme reports on its website that it has recorded 1068 known "Potentially Hazardous Asteroids", however there are thousands more estimated to be present in space.
Both of these manoeuvres would be less hazardous if the pilot could call on a second source of power to turn the blades for a few seconds while he was performing them, and Jean-Michel Billig and his team at Eurocopter (part of EADS, an aerospace and defence group) hope to provide just that.
"In terms of trying to prognosticate who the next pope will be, that is a hazardous enterprise, " said the Rev.
Rosneft would be able to tap into BP's expertise in exploring in difficult and potentially hazardous conditions.
The large robotic arm, which is connected to a laser cutting tool, can be manoeuvred around tight spaces in hazardous environments.
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