The ecological impact of pizza on the enviroment depends on the sort of pizza you have and how much topping you put on. For example if you have a Pepperoni pizza and have just pepperoni, cheese and tomato base it would probably have to have a lower ecological impact than a pizza such as a supreme pizza which has a lot of stuff in it.
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Interpretation Of the Above Graph

The graph above shows us how much ingredients it takes to make a supreme pizza.
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Interpretation Of The Graph Above

The above graph shows us that the different impacts on the inviroment pizza ingredients have.

Bacon has a lot because it has to be taken off the pig ad all sorts of other things. The ingredients that come from the ground don't have a big impact because we can easily dig them up.