system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why the US congress is trying to class pizza a vegetable

I've only seen the odd joke about it here and there, what are they actually doing it for? Is it in the interests of the pizza industry or something? &#3232;\-&#3232;
gpt
Food in school has to meet various nutritional requirements. It had to include like 1 serving of veg, 1 serving of protein or whatever. 

It was lobbied by the food manufactures that the tomato paste used as sauce on school pizzas should be considered a vegetable. 

It ends up being more cost effective, although obviously not better for the students.