"Philadelphia's $2 billion plan to manage its storm water with green methods - porous pavement, green roofs, and a plethora of trees -- got the official nod Tuesday from the U.S. Environmental Protection Agency."

"Dave Mauser walked the edge of a mudflat, peering underneath the dried brown rushes where one coot after another had gone to hide and then die."

"ALBUQUERQUE -- New Mexico, Arizona and more than two dozen other states could face increased threats to water supplies if they don't do more to plan for rising temperatures and changes in rain and snowfall patterns, according to an analysis released Thursday by the Natural Resources Defense Council."

Chicago's "sewer network, built and maintained by the Metropolitan Water Reclamation District of Greater Chicago, is a behemoth among urban wastewater collection systems. Girded by more than 109 miles of deep underground pipe, Chicago's massive 'Tunnel and Reservoir Plan' (TARP) ranks among the nation's largest public works projects, both in term of scale and cost, estimated at $3.58 billion."

"MEXICO CITY — Two years after the worst offshore oil spill in U.S. history, Mexico's state oil company is about to test its hand at drilling at extraordinary depths in the Gulf of Mexico."

"Nautilus Minerals of Australia has a license from Papua New Guinea to mine a site the size of 21 football fields for its rich deposits. The minerals are found there in very high concentrations, because a natural hot spring on the seafloor has been laying them down for thousands of years."