Superman/Batman

"The critically acclaimed series returns in this fifth volume of the series with new creative team Alan Burnett and Dustin Nguyen. It has become clear to Superman, Batman and the Justice League that Kryptonite is a much more widespread problem than they believed. Superman and Batman begin to hunt down what seems to be an endless supply of Kryptonite across the globe, even finding a 28 ton chunk under the ocean. But in order to rid the world of the Kryptonite infestation, Superman threatens to cripple entire ecosystems and cultures who have grown to depend on it. Collects SUPERMAN/BATMAN #37-49"--