Smithsonian: Plastic pollution in the world`s oceans is a problem that has recently gained a lot of attention. Earlier this year a report from the World Economic Forum claimed there could be more plastic in the ocean than fish by 2050 and president Obama signed a ban on plastic microbeads into law late last year. Now, a new study shows that the problem may be more urgent than first thought-some baby fish choose plastic microparticles over natural food, leading to stunted growth and changes in behavior. In a…