This satellite image from Oct. 28 shows Hurricane Sandy in the Atlantic Ocean before making landfall. NASA via Getty Images hide caption

itoggle caption NASA via Getty Images

Cracks form in the bed of a dried lake in Waterloo, Neb. The drought withered crops and dried out lakes across the nation's midsection in 2012. Nati Harnik/AP hide caption

itoggle caption Nati Harnik/AP

Mosquitoes like this one can carry the virus that causes dengue fever, which may become a bigger problem in some regions as biodiversity is lost. James Gathany/CDC Public Health Image Library hide caption

itoggle caption James Gathany/CDC Public Health Image Library

Photographer Freya Najade journeys into the weird sci-fi world of Europe's agricultural production. In one cow-milking facility she visited, "two people are needed to milk twice a day 300 cows," she writes. Freya Najade hide caption

itoggle caption Freya Najade

People in Takoma Park, Md., walk toward a fallen telephone pole on June 30 after heavy overnight thunderstorms devastated the Washington, D.C., metropolitan area. The line of storms known as a derecho left over 1 million people without power. Kevin Dietsch/UPI/Landov hide caption

itoggle caption Kevin Dietsch/UPI/Landov

David Daniel, an east Texas landowner, was so determined to block the Keystone XL pipeline from coming through his forest that he took to his trees and built an elaborate network of treehouses eight stories above the ground. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

Mike Score, president of Hantz Farms, shows off a small-scare version of what Hantz Woodlands will look like. Sarah Hulett for NPR hide caption

itoggle caption Sarah Hulett for NPR