It can blister a person's lungs if it is inhaled and can cause death in high concentrations.
For example, nicotine in high concentrations is a potent poison.
If they occur in sufficiently high concentrations, they can kill a cell.
However, there are only a handful of places in the world where rare earths are found in high enough concentrations to make extracting them commercially feasible.
It's unclear, however, exactly where Metrico tested data bandwidth, and as any iPhone-toting San Francisco resident will tell you, data quality can be terrible in areas with high concentrations of tech geeks.
Wolfe-Simon and her colleagues found the critter in a lake in eastern California with high arsenic concentrations.
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"We target institutions with high degrees of leverage, high concentrations of assets in deteriorating sectors and rising credit costs, " Paulson wrote this spring.
In 2011, concentrations reached a new high of 1813 parts per billion (ppb), 259% higher than pre-industrial levels.
An extended heat wave occurred during the summer of 1995 and particularly high ozone concentrations were recorded in the eastern United States.
This is effective: samples of the air above breaking water show high concentrations of minute organisms normally found in the water.
Soot concentrations peaked in 1906-1910 and remained high for decades.
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In the fat-shedding livers, by contrast, she found high concentrations of a protein called fatty-acid-binding-protein 4.
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Concentrations of greenhouse gases in the atmosphere rose to yet another high in 2010, according to the UN's weather agency.
Many of these places enjoy enormous assets in terms of universities, strategic location, concentrations of talented workers and entrenched high-wage industries.
"These foods were chosen because they contain high concentrations of crucial nutrients, as well as the fact that many of them are low in calories, " the website states.
To increase production fish are packed in ever tighter, inviting disease outbreaks (and the expensive antibiotics and pesticides needed to combat them) and high concentrations of waste that poison the pens and the surrounding waters.
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