A DES is a synthetic estrogen, diethylstilbestrol is used as a growth stimulant in food animals. Residues in Meat are thought to be carcinogenic.

In the context of the environment, "DES" can refer to a number of different things, depending on the specific context. Here are a few examples of how "DES" might be used in the context of the environment:

1. Dichlorodiphenyltrichloroethane (DDT): DDT is a type of insecticide that was widely used in the mid-20th century to control pests such as mosquitoes, lice, and fleas. However, it was later found to have negative impacts on the environment, including the accumulation of DDT in the food chain and the disruption of reproductive systems in birds. As a result, the use of DDT has been restricted or banned in many countries.

2. Dense shelled eggs (DSEs): In the context of marine environments, "DSEs" might refer to eggs that have a thick or hard outer layer, which helps to protect them from predators and other threats. Some marine species, such as sea urchins, produce DSEs as part of their reproductive cycle.

3. Downstream effects (DES): In this context, "DES" might refer to the impacts or effects that are felt downstream from a particular activity or event. For example, the DES of a chemical spill might include the contamination of downstream water sources, or the negative effects on wildlife and ecosystems downstream from the spill.