Earth Day Footprint Quiz

I just did Earth Day's Ecological Footprint quiz and my score left a lot to be desired. I scored 3.5 earths, meaning that if everyone lived like I do, we would need 3.5 earths. I have mixed feelings about the quiz. On one hand, I agree that I need to improve my living by making it more sustainable. However, I find their quiz does not quantify enough of the questions which leaves lots of wiggle room, meaning they could skew things towards their agenda. Either way, I think these types of quizzes are an important way for many to quantify their consumer behavior.