Final answer:
A steel factory dumping waste directly into a lake is an example of a negative impact on the environment, causing pollution and harming the aquatic ecosystem.
Step-by-step explanation:
This situation is an example of a negative impact on the environment. When waste from a steel factory is directly thrown into a lake, it can cause pollution and harm the aquatic ecosystem. The waste can deplete oxygen levels in the water, leading to the death of fishes and other aquatic organisms. This pollution can have long-lasting detrimental effects on the biodiversity of the lake. and causing pollution and harming the aquatic ecosystem.