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Shade Balls Prevent Water Evaporation
Mayor Eric Garcetti joined other city officials Monday to release 20,000 shade balls onto the Los Angeles Reservoir, the final step in a $34.5 million water quality protection project.

The Los Angeles Department of Water and Power project involved the release of 96 million shade balls into the reservoir at the Van Norman Complex in Sylmar. This water control method is $250 million cheaper than another process that was considered.

The black, plastic shade balls — costing 36 cents each — protect the water in the 175-acre reservoir against dust and rain, birds and wildlife, and chemical reactions caused by the sun. It is also expected to keep about 300 million gallons of water from evaporating each year.



 
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Uncertain Environmental Consequences of Herbicide Use - Florida water managers spray upward of $15 million worth of herbicides annually to keep the invasive plant in check on public lands — with uncertain environmental consequences.


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