Complete the sentences using your own ideas помогите прошу​

1) if we don't protect the environment.. *it will become polluted with contaminants and toxins that have a harmful impact on our health*
2) The students at our school will protest if teachers don't stop corruption.
3)People will stop acting aggressive against each other.
4)If I get in trouble or get sick
5) if he has some free time
6) some species are at risk of being made extinct