environmental pollution

I'm going to introduce an environmental pollution problem in Japan.

In 1960, Japan developed industry rapidly and became second highest GDP of the world. . It is called rapid economic growth. People drained toxic substances out of the sea and gave noxious gas in the air, but people didn't know that they were detrimental for the living things.

First, fish disappeared because of the pollution, then many cats died mad because they ate the polluted fish. Finally, people got sick and suffered from discrimination for all their lives.

Now polluting the environment is prohibited by laws. We will never forget serious mistakes and we have to keep this sad story in mind.