Answer:
Mark Kurlansky is a writer and journalist who has written extensively about the impact of pollution on the environment, including its effects on fish. In his book, "World Without Fish," Kurlansky explains that pollution is having a profound impact on fish populations in a number of ways.
One of the main ways that pollution is affecting fish is by contaminating their habitats. Chemicals and other pollutants that are released into the environment can accumulate in waterways, making them toxic to fish and other aquatic creatures. These pollutants can interfere with fish reproduction and growth, and can even lead to deformities and other health problems.
Pollution can also affect the food sources of fish, leading to starvation and malnutrition. For example, when oil spills occur in the ocean, they can kill off plankton and other small organisms that form the base of the food chain for many fish species.
In addition to these direct effects on fish populations, pollution can also impact the fishing industry as a whole. When fish become contaminated with pollutants, they may be unsafe for human consumption, leading to health concerns and economic losses for fishermen and seafood producers.
Overall, pollution is having a significant impact on fish populations around the world, and addressing this problem will be critical for the health of both marine ecosystems and human communities that rely on fish as a food source.