Man-made environmental anomaly refers to a phenomenon in which one or more environmental elements of the natural environment have changed significantly due to human behavior within a certain geographic area, which disrupts the relative balance of the ecosystem.
According to the above definition, which of the followings is human-made environmental abnormaly?
Recently, an industrial park along the river in a certain place has a large number of orders, and the amount of discharged wastewater has also increased sharply. As a result, a large number of fish and shrimps in the lower reaches of the river have died, and the crops along the coast have died in vast stretches. 