Dear Mr. Petsinger,
I would like it if you could ask the cafeteria management to stop using plastic. There are many other materials we can use instead. There is glass, bamboo, cardboard, metal and even a type of plastic that is compostable (it is made out of corn). I am asking you Mr. Petsinger to accept this and start doing this. I will get at least 50 signatures for you to act. 
I acknowledge that you accept this demand. If you do accept this you are helping the world. If you accept this your making me happy. I need everybody to sign this for the world. If you sign this petition you are not only helping me, but you are mostly helping the world. Please sign this petition. The world needs us (that means everybody) to fix what we have done to it. If you want to save the world one small step at a time, we will all do it together. I also encourage you, people of the world, to ask your own school to use less plastic as well. If you guys are with me, sign this petition. 
Your student and classmate, Luca