Написать несколько предложений на языке на тему экологические проблемы

1) Pollution of the seas, rivers, and so on. result to the extinction of fish. 
2) Deforestation leads ktomu that no where birds live.
3) forest fires that people make.
4) If people do not think about the environment that our children will not see the beauty of nature
5) From ecology depends on the health of humans and animals.