Heavy metals like nickel and zinc are usually the last thing that plants want to grow next to in high concentrations.
Although lethal in high concentrations, blister agents seldom kill.
Studies also show that anthrax toxins are usually present in high concentrations in the blood.
The drug most commonly found was alcohol, often in high concentrations.
Where horse has been found in high concentrations, they say it suggests industrial scale adulteration.
Mercury and dioxins, in particular, have been found in high concentrations in some fish.
Omega-3s are found in high concentrations in fish and walnuts.
In high concentrations, which are most effective as repellents, DEET can be highly toxic to children.
Finally, the scientists engineered the microbe to keep breaking down cellulose in high concentrations of ethanol.
Heavy metals such as mercury, arsenic, carcinogenic cadmium and lead have also been detected in high concentrations.
Studies have shown that DEET can cause neurological problems, especially in children, if used in high concentrations for prolonged periods.
