Surgeonfish on a reef in the Maldives.
Drastic oxygen losses in the world's oceans millions of years ago coincided with mass extinctions. Scientists see this as a warning about how climate change could affect oceans today.
Healthy aquatic vegetation in the Chesapeake Bay.
Cassie Gurbisz/University of Maryland Center for Environmental Science
An ambitious plan to cut the flow of nutrients into the Chesapeake Bay has produced historic regrowth of underwater seagrasses. These results offer hope for other polluted water bodies.
Harvepino / shutterstock
Oxygen-free areas will continue to grow until we stop pumping excess nutrients into the oceans.
Harmful algal bloom caused by nutrient pollution, Assateague island National Seashore, MD.
Eric Vance, U.S. EPA/Flickr
Excess nutrients from farm fields cause widespread water pollution across the U.S. Bioreactors -- essentially, ditches filled with wood chips -- are emerging as a way to reduce nutrient pollution.
Climate change is warming Lake Tahoe and could alter its chemistry in harmful ways.
Lakes contain most of the fresh water on Earth's surface. Recent research at Lake Tahoe in the Sierra Nevada mountains shows that climate change could alter lake chemistry, threatening these sources.
Our thinly spread efforts to prop up the environment are failing and it is time for tough decisions about what we can realistically preserve.
Australian farmers take pride in their efficient and productive farming systems, competing in the global economy and without many of the large subsidies given to their counterparts in Europe and North…