Incorrect
Ves* one person
vayas is for one person but it doesnt go in the contest your trying to use it in.
La pollucion es una problema en todos lados. Es una problema comun mundial. Ha incrementado porque mas y mas gente.. I would help you with the rest but its too many sentences lol.
1. Voy
2. Van
3. Va
4. Va
5. Vamos
6. Irás
The last question
Yo iré a mi práctica de fútbol esta tarde.
I hope that help you :)
