Sometimes albatrosses, as well as many other kinds of seabirds, are killed because they eat plastic. The amount of plastic eaten in the seas has increased very quickly since the first record in the 1960s. This is because of waste thrown overboard by ships and trash dumped in the ocean. Sometimes litter on beaches has been washed into the sea by rivers. It is impossible to digest plastic, and the undigested plastic stops other food from being digested. This makes birds starve and die. The plastic can even be vomited out and fed to the chicks by the parents. Although plastic is not the main reason why albatrosses die, it is still a serious problem.