What is the role of と in this case?


What is the role of と in this article title?

花粉 この春東京都内で飛ぶ量は去年 **と** ほぼ同じ




Together with 同じ it is how you phrase "to be the same as". ほぼ means "roughly".
So in this case, it means that there is roughly the same amount of pollen as
there was last year.

