 She's done a lot of work on the impact of plastic on birds particularly. Birds eat the plastic once it's in the water because it's floating there. It looks like the things on the surface that they eat, once they eat the plastic, it's both that it kind of makes them heavier and it makes them hungry, but fills up their bellies and they can't get rid of it. But then they can't hold nutrition. They feed it to their chicks and then the chicks can't develop because they're full of plastic and they can't fly.