Speech ideas

so the speech comp is coming soon so i put down some ideas..

why school uniforms should/should not be compulsary
trees must not be cut down
why kids should be able to drive
pollution must be stopped
cars are taking over the world
social networks should be allowed
why my sister was born annoying
people are losing intelligence
why I should be prime minister
my life
extinct animals
people are getting no exercise
help the homeless