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For years, clean energy advocates have pointed towards hydroelectricity as an important alternative to gas, coal and nuclear power plants. But a new study suggests that the dams and reservoirs commonly associated with this clean energy source are actually pumping a significant amount of carbon emission into the air.

The Los Angeles Department of Water and Power has now dumped 96 million balls into local reservoirs to reduce evaporation and block sunlight from encouraging algae growth and toxic chemical reactions. The balls are coated with a chemical that blocks ultraviolet light and helps the spheres last as long as 25 years.

"Shasta Lake, the largest reservoir in California and a critical source of water for Central Valley farms and cities from the Bay Area to Bakersfield, reached 100 percent of its historic average Sunday as billions of gallons continued to pour in from drenching downpours."

Southern Co.'s coal plants are among the biggest carbon emitters in the U.S., but the company is about to build a new carbon-capture plant that could play a vital role in slowing climate change. The Mississippi plant, along with another in Canada, will capture carbon emissions and pump them into depleted oil reservoirs

The wonderful world of Disney will soon include a piece of Bethlehem. The Walt Disney Co., whose fictional forests created cover for characters from Bambi to Snow White, has finalized an environmental deal involving the 20,000 acres of lush woods surrounding Bethlehem's water reservoirs.

In a creative attempt to protect California's waning water supply, Los Angeles released 20,000 "shade balls" into the LA Reservoir. According to researchers, shade balls could reduce surface evaporation by 85 to 90 percent, protect water quality by preventing chemical reactions triggered by sunlight, deter birds and other wildlife, and protect the water from rain and wind-blown dust. 

After years of unrelenting drought, federal forecasters reported there are better-than-even odds that the nation's largest reservoir will decline into shortage conditions by 2020, forcing Arizona, Nevada and Mexico to reduce their Colorado River water use.

Climate change and other hurdles mean it will take more water - and potentially more taxpayer money - to save the Everglades, according to new scientific findings released Thursday. The report to Congress warns that rising seas and warming temperatures are threatening to worsen damage already done by decades of drainage and pollution, caused by development and farming overtaking the Everglades. A recent report showed that climate change, pollution and other factors could increase the cost to restore the Florida Everglades. So far, restoration costs are pegged at $16 billion, but additional efforts, such as proposed reservoirs, could add to that cost.