http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- As federal agencies respond this month to President Barack Obama's executive order to redouble efforts to clean up the Chesapeake Bay, the challenge in Pennsylvania is to focus on local initiatives aimed at helping agricultural producers and their nonfarming neighbors adopt conservation practices that can improve water quality in bay tributaries, according to an agricultural pollution expert in Penn State's College of Agricultural Sciences. http://www.physorg.com/news172323932.html Space & Earth Wed, 16 Sep 2009 12:46:44 EST news172323932 (AP) -- Thousands of mining claims dot 1 million acres near the Grand Canyon, and Interior Secretary Ken Salazar says his department has a responsibility to ensure those resources are developed in a way that protects communities, treasured landscapes and watersheds. http://www.physorg.com/news167380437.html Space & Earth Tue, 21 Jul 2009 07:34:30 EST news167380437 The Pacific Northwest has spent two decades retooling dams, rebuilding damaged watersheds and restoring stream flows to keep salmon from disappearing. http://www.physorg.com/news161366583.html Biology Tue, 12 May 2009 17:03:27 EST news161366583 Following the Clean Air Act Amendments of 1970 and 1990 acidic deposition in North America has declined significantly since its peak in 1973. Consequently, research has shifted from studying the effects of acidic deposition to the recovery of these aquatic and terrestrial ecosystems. Regional-scale studies have focused primarily on aquatic systems and while many of these ecosystems are showing signs of chemical recovery (increases in acid neutralizing capacity and pH, decreases in sulfate and aluminum concentrations), recovery is slower than expected based on the magnitude of the decline in acid deposition. http://www.physorg.com/news150988084.html Space & Earth Mon, 12 Jan 2009 13:08:04 EST news150988084