By Cat DiStasio
In grade school, most children learn about the fragility of our ocean ecosystems. Despite this, the world's vast waters have become a de facto dumping ground for toxic chemicals, agricultural runoff and plastic trash. With ocean pollution at an all-time high, the question of how to turn it around weighs heavily on the minds of many environmentalists and engineers. So far they've come up with everything from oil-cleaning magic wands to massive floating cleanup arrays, but it's a race to see which method will most effectively reverse the damage humans have wrought. Which of these amazing gadgets do you think has the best shot at cleaning up our oceans?