We talk a lot about dead zones in Iowa, particularly the one in the Gulf of Mexico. In summer, a large area is nearly devoid of oxygen, so sea life either moves along or dies. The oxygen is consumed when algae decompose. We come in because the crop fertilizers applied in places such as Iowa and Illinois go down the Mississippi River and feed huge algae blooms. But many don’t realize that there are dead zones all over the planet. And the size of the combined dead zones has quadrupled as climate change progressed, Huffington Post reports. Read more