The phrase "are present in the environment" is correct and usable in written English.
It can be used when discussing elements, factors, or species that exist or can be found in a particular setting or context.
Example: "Various pollutants are present in the environment, affecting both wildlife and human health."
Alternatives: "exist in the environment" or "found in the environment".
Polymers such as lignin, starch, chitin, etc., are present in the environment naturally.
These nuclides are present in the environment at ultra trace levels.
Inevitably pesticides are present in the environment and can be found in agricultural products, food for livestock, wood and derivatives.
ENMs do not reach thermodynamic equilibrium but are present in the environment as suspensions of different stability [5, 50].
Organic pollutants such as polycyclic aromatic hydrocarbons (PAHs) are present in the environment in increasing concentrations and so are of growing concern.
If amino acids are present in the environment, microorganisms can conserve energy by taking up the amino acids from their surroundings and downregulating their biosynthetic pathways.
Silver has been present in the environment as an antiseptic far longer than humans have existed, but there are indications that manmade, nanoscale silver particles are more lethal to microbes — including beneficial microbes.
He has justified gold-mining operations that have caused devastating spills of sodium cyanide by arguing that "cyanide is present in the environment and naturally available in many plant species".
Even far higher dosages are expected to be present in the environment of farm animals (Ratzinger2010; Vogelzang et al.1998).1998
Iron is the most abundant element in the earth's crust and the most abundant heavy metal; it is present in the environment mainly as Fe2+ or Fe3+.
Bioconcentration factor (BCF) is a fundamental property, describing the likelihood of a chemical concentrating in organisms, when the compound is present in the environment.
