laid out the teaching and research principles for ecotoxicology at the University of Metz with his colleague, Jean-Marie Pelt, as early as 1971. In France, two universities (Metz and Paris-Sud) markedly contributed to expand this burgeoning discipline during the 1980s and 1990s. Several institutes followed suit in this respect. Indeed, CEMAGREF (now IRSTEA), INERIS, IFREMER and CNRS created research units in ecotoxicology, as did other French universities (in Rouen, Bordeaux, Le Havre, Lyon, Lille, Caen...). During the 1990s, a new offshoot of ecotoxicology casually appears known as Landscape ecotoxicology, whose objective seeks to take into account interactions between landscape ecological processes and environmental toxicants, in particular for species undergoing impediments linked to migratory passageways* (e.g., salmonids). Common environmental toxicants PCBs (polychlorinated biphenyls) – found in coolant and insulating fluids, pesticide extenders, adhesives, and hydraulic fluids. Pesticides – used widely for preventing, destroying, or repelling any organism that may be considered harmful. Commonly found in commercially grown fruits, vegetables, and meats. Methyl parathion is a commonly used pesticide used for agricultural reasons. Methyl parathion causes the formation of toxic mediums for humans, soil and water, fresh water fish, and other hydrophilous organisms in the ecosystem. Methyl parathion proposes numerous health risk factors that are life-threatening. Mold and other mycotoxins. Phthalates are found in plastic wrap, plastic bottles, and plastic food storage containers, all of which make up a considerable part of household plastic waste. VOCs (volatile organic compounds) – such as formaldehyde; can be found in drinking water and sewage systems. Dioxins are a class of chemical compounds that are formed as a result of combustion processes such as waste incineration and from burning fuels like wood, coal, and oil. Asbestos is found in the insulation of flows, ceilings, water pipes, and heating ducts. Heavy metals include arsenic, mercury, lead, aluminum, and cadmium, which are found in fish, and pesticides. Chloroform is used to make other chemicals. Chlorine is commonly found in household cleaners. Exposure to toxic chemicals Chemicals propose the risk of killing off another animal's food supply that changes the overall population of the prey Animals can go to the brink of extinction because of the food chain that exists through the different communities. For example, bald eagles, ospreys, and peregrine falcons were facing extinction because their food sources (fish and other birds) were contaminated with toxins. We are all connected between the communities of living things. Plants can