life-support systems / food chain / find food / food production / overloaded sewage treatment systems / food / /
NaturalFeature
Chesapeake Bay / Sea Ducks Common Eider / Mississippi River / Texas gulf / /
OperatingSystem
Cygnus / Aix / /
Organization
U.S. Environmental Protection Agency / US Federal Reserve / American Ornithologists’ Union / U.S. Fish and Wildlife Service / Michigan Department of Natural Resources Bald Cypress Swamp Okefenokee National Wildlife Refuge Bogs / /
Person
Brant Greater White / Black Duck / Chris Hoving / Robert E. Stewart / Jr. / Anas Americana / Cameron Prarie / Sabine Marsh / Ryan Hagerty / Geese Greater White-fronted / Snow Goose / Spectacled Eider / /