 To get a better idea of the amount of litter in our oceans, scientists are getting a bird's eye view. Maybe a better description would be an astronaut's view, as Tracy Wolf tells us. Ocean trash is such a big problem that scientists have now designed a new sensor to track marine litter from space. Trash in the ocean is any human-made item that ends up in water, and 80% of it is made of plastic. Scientists are now able to use a space satellite to detect hotspots