You're a young environmentalist, like Greta Thunberg. Write a speech to make people
react and protect the environment. In your speech, talk about:
Your childhood and your actions then (use USED TO / DIDN'T USE TO)
Your experiences (use the present perfect) and ask your audience questions
Give your audience pieces of advice (use SHOULD/SHOULDN'T)
Give your audiences orders (use the imperative form): convince them!
You can make a Powerpoint presentation to illustrate your ideas.