In the past decade, freshwater and sediment diverted from the nearby Mississippi River have turned what once was an open bay into a thriving wetlands area. Local environmental groups have planted thousands of cypress trees, attempting to create a marsh that will help absorb storms that pass through. Weenta Girmay for WWNO hide caption

itoggle caption Weenta Girmay for WWNO

A town in California's Central Valley plans to transform farmland into an eco-friendly residential community. An artist's rendering shows plans for Kings River Village in Reedley, Calif. Courtesy of the City of Reedley hide caption

itoggle caption Courtesy of the City of Reedley

A Tea Party supporter rings a bell in protest of the health care law in front of the U.S. Supreme Court, as Obamacare supporters shout behind her. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images

Fresh oil puddles on the white sand in Orange Beach, Ala., during the BP oil spill in 2010. Debbie Elliott/NPR hide caption

itoggle caption Debbie Elliott/NPR

Joshua Haggmark, Santa Barbara's water resources manager, is in charge of getting the city's desalination plant back online. Becky Sullivan hide caption

itoggle caption Becky Sullivan

A baby orangutan wearing a diaper swings through the trees at the Sumatran Orangutan Conservation Program outside Medan, capital of Indonesia's North Sumatra province. The program takes mostly orphaned orangutans, nurses them back to health and releases them back into the wild. Anthony Kuhn/NPR hide caption

itoggle caption Anthony Kuhn/NPR

A demonstrator dressed as a bather protests against the rationing of water, outside the official residence of Sao Paulo's Governor Geraldo Alckmin in Sao Paulo, on Jan. 26. The banner behind him reads, "Planet Water, Dry Lives." Andre Penner/AP hide caption

itoggle caption Andre Penner/AP

A worker installs solar panels atop a government building in Lakewood, Colo. The industry has added more than 80,000 jobs since 2010, according to The Solar Foundation. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images

Susan and Bill Dunavan own 80 acres of land in York County. Melissa Block/NPR hide caption

itoggle caption Melissa Block/NPR

California Gov. Jerry Brown has signed the nation's first statewide ban on single-use plastic bags. Here, mixed plastic items are seen at a recycling plant in Vernon, Calif., earlier this year. Reed Saxon/AP hide caption

itoggle caption Reed Saxon/AP

Gorillas in Virunga National Park in Democratic Republic of Congo, in 2013. Great apes like the gorilla have become increasingly threatened by the expansion of palm oil production in Africa. Brent Stirton/WWF/Canon/Getty Images hide caption

itoggle caption Brent Stirton/WWF/Canon/Getty Images

The Drakes Bay Oyster Farm caters to local residents and restaurants. But unless its lease is renewed, its days are numbered. Richard Gonzales/NPR hide caption

itoggle caption Richard Gonzales/NPR

Wheat fields like this one could yield wheat with less zinc and iron in the future if they are exposed to higher levels of CO2, according to the journal Nature. Zaharov Evgeniy/iStockphoto.com hide caption

itoggle caption Zaharov Evgeniy/iStockphoto.com

Volunteer Tom Strain carries debris from an empty lot as part of an Earth Day cleanup effort in Camden, N.J. The Earth Day events celebrated on April 22 promote a sustainable and clean environment. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP

Police were checking cars throughout Paris on Monday, including near the Arc de Triomphe, as the city tried to cut air pollution by instituting odd-even driving restrictions. Philippe Wojazer /Reuters /Landov hide caption

itoggle caption Philippe Wojazer /Reuters /Landov

A tasseled wobbegong shark (top) lies on the seafloor with the head of a brown-banded bamboo shark in its mouth on the fringing reef of Great Keppel Island on Australia's Great Barrier Reef in August 2011. Reuters/Landov hide caption

itoggle caption Reuters/Landov

An animal's ranking on the food chain depends on where its meals place on the ladder. That puts plants on the bottom (they make all their food), polar bears on top and people somewhere between pigs and anchovies. Lisa Brown for NPR hide caption

itoggle caption Lisa Brown for NPR

Saltwater wetlands that include marshes and shoals on Virginia's Atlantic coast. U.S. coastal wetlands losses were 25 percent greater from 2004-2009, according to a recent federal study. U.S. Fish and Wildlife Service hide caption

itoggle caption U.S. Fish and Wildlife Service