They aren't renewable, they take up a lot of energy, they will most likely end up in an ocean, they kill animals, they take a really long time to disintegrate, they contain toxins, we are already consuming plastic bags, they stop up storm drains, they are costly, and no one recycles them!
The last sentence describes and conveys that the thoughts were racing through her mind at the SAME time she was calling her grandmother. This sentence helps the reader visualize the situation.
