### hydrocarbon:

Dioxin
* Many dioxins cause cancer.
* Some dioxins are among the most toxic of all chemical pollutants.
  * These are organic compounds. They are very poisonous. Many dioxins cause cancer.
* also affect sperm count and damage the immune system
  - appear to be more toxic to male embryos than to female embryos
  - can come from natural sources, however
  - turn up in fish, meat, and dairy products
* appear to have a particularly powerful impact on the ovary.
* are a by-product of incomplete incineration of medical and municipal waste
  - byproduct of herbicide production
  - class of dangerous chemicals which accumulate in body fat
  - group of chemicals known to increase the likelihood of cancer
  - groups of highly toxic chemicals, which are known to cause cancer
  - product of combustion
  - also highly persistent in the environment
* are among the most deadly pollutants
  - poisonous man-made chemicals
  - potent chemicals known that affect gene regulation
* are among the most potent toxic chemicals ever studied
  - toxic molecules known from laboratory studies
  - another branch of dangerous and persistent chemicals
  - byproducts of producing or burning substances that contain chlorine
  - carcinogenic and harm the reproductive and immune systems
  - chemical contaminants that have no commercial usefulness by themselves
  - chemicals viewed as even more toxic than PCBs
  - chlorine byproducts that are most abundant in dairy products and fatty meats
  - especially dangerous to children
  - everywhere
  - extraordinarily toxic molecules
* are extremely resistant to chemical and biological cleanup processes
  - toxic for Guinea pigs, but a thousand times less toxic for other animals
  - toxic, and can harm living organisms at the level of parts per billion
  - fat-soluble, and accumulate in organisms from dietary sources
  - global pollutants that exist primarily as a result of certain industrial practices
  - highly toxic at very low levels
* are long-lived and extremely poisonous to some animals
  - in the environment and can accumulatein the tissues of animals and humans
  - more than carcinogens
  - one of many organic chemicals released by all fires including the burning of carcasses
* are one of the most toxic chemicals known to man
  - chemicals known to science
  - compounds known to man
  - persistent, toxic and bioaccumulative substances
* are potent cancer-causing agents
  - carcinogens and endocrine disrupters that can cause birth defects
  - present in the environment primarily because of the burning of fuels, wood and waste
  - probable human carcinogens and can cause a type of dermatitis in humans
  - strong human carcinogens, especially brain cancers
  - supremely toxic by-products of many industrial processes, especially incineration
* are the byproducts of combustion processes
  - most toxic of the substances the labs searched for
  - unwanted by-products of the manufacture of herbicides
* are toxic byproducts of industrial processes and combustion
  - substances created during the incineration process
  - ubiquitous environmental contaminants with multiple, endocrine disruptive actions
* are unwanted by-products of industrial processes, especially waste incineration
  - byproducts of human activities
  - very potent toxins that have been found to cause cancers
  - widespread, highly toxic, environmental pollutants
* binds DNA and disrupts enzymes, hormones and growth.
* bring about a wide spectrum of biochemical and toxic effects in experimental animals.
* can alter the fundamental growth and development of cells in ways that lead to cancer
  - wreak such havoc because they are very soluble in fats and oils
* cause changes in hormonal levels and molecular reactions when it enters animal cells.
* contains chlorine.
* damage the human immune system.
* get into the bodies of people and wildlife primarily through food.
* have a wide range of toxic effects
  - no use as such
  - two phenyl rings connected by two oxygen atoms
* intensify cancers which other toxics begin.
* occur as mixtures.
* resist natural breakdown, persist for decades, and accumulate in the human body.
* take time to build up on grass and can be washed away.