However, they usually are not persistent in the environment.

All groups of dioxin-like compounds are persistent in the environment.

These organisms are very persistent in the environment and can survive unusually harsh environmental conditions.

Mercury is extremely toxic, bioaccumulative and persistent in the environment.

In comparison with dieldrin, endrin is less persistent in the environment.

It is persistent in the environment.

It has been shown to be 30 times more acutely toxic than chlorothalonil and more persistent in the environment.

It is bioaccumulative and persistent in the environment and there is no safe exposure level.

Chlordane is very persistent in the environment because it does not break down easily, and it could also polymerize into a larger molecule.

Mercury compounds are toxic, highly persistent in the environment, and present a danger to humans and the environment.

Because of the strength of the carbon-fluorine bond, many synthetic fluorocarbons and fluorcarbon-based compounds are persistent in the environment.

Nonylphenol is persistent in the environment, therefore lingers with the potential to negatively affect organisms it comes in contact with.

It is persistent in the environment, as it does not biodegrade easily and does not undergo hydrolysis.

DDT is known to be very persistent in the environment, will accumulate in fatty tissues, and can travel long distances in the upper atmosphere.

But because the compounds were persistent in the environment and in human blood, the company said it alerted regulators and began working to come up with alternative compounds.

These are produced either as side products of industrial processes or as end products which are persistent in the environment, such as certain chlorinated pesticides and chlorofluorocarbons.

POPs with molecular masses lower than 236 g/mol are less toxic, less persistent in the environment, and have more reversible effects than those with higher molecular masses.

DDT and its metabolites DDE and DDD are persistent in the environment and accumulate in fatty tissues.

In its reports EJF has expressed concern that, like DDT, endosulfan is persistent in the environment, where it is harmful to mammals, fish, bees, birds and other wildlife.

While PFBS is expected to be persistent in the environment, multiple studies (that are not referenced in following reference[5]) claim that PFBS is neither toxic nor bioaccumulative.

Another family of chemicals, polychlorinated biphenyls, or PCB's, seemed well suited as the fluid in electrical transformers, until they were found to be highly toxic, persistent in the environment and have a tendency to accumulate in the fatty tissue of humans and animals.

EPA has been investigating PFOA because it: Is very persistent in the environment Is found at very low levels both in the environment and in the blood of the general U.S. population Remains in people for a very long time Causes developmental and other adverse effects in laboratory animals.