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Siting solar, sparing prime agricultural lands
by Staff Writers
Davis CA (SPX) Jan 02, 2018


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Unconventional spaces could be put to use generating renewable energy while sparing lands that could be better used to grow food, sequester carbon and protect wildlife and watersheds, says a study led by the University of California, Davis.

These land-sparing spaces include: 1) built environments, such as rooftops 2) salt-affected land 3) contaminated land, and 4) water reservoirs with floating solar arrays, or "floatovoltaics."

The study, published in the journal Environmental Science and Technology, notes that unique technical, economic and institutional barriers exist for each land type. But with more incentives that encourage renewable energy development on these lands, they could more than meet state energy demands.

The study focuses on the Central Valley, a globally significant agricultural region encompassing about 15 percent of California. The research found that using these land-sparing site types in the Central Valley alone could exceed the state's projected 2025 electricity demands up to 13 times for photovoltaics and up to two times for concentrated solar power.

"In the era of looming land scarcity, we need to look at underused spaces," said corresponding author Rebecca R. Hernandez, an assistant professor in the Department of Land, Air and Water Resources at UC Davis.

"This paper provides a menu of sorts for farmers, agricultural stakeholders and energy developers to think about energy projects on spaces that don't require us to lose prime agricultural and natural lands, which are becoming increasingly limited."

The study underscores the potential of siting renewable energy projects while largely avoiding the environmental trade-offs that often accompany energy sprawl and climate change mitigation.

Research paper

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In a single hour, more energy from the sun hits the Earth than all the energy used by humankind in an entire year. Imagine if the sun's energy could be harnessed to power energy needs on Earth, and done in a way that is economical, scalable, and environmentally responsible. Researchers have long seen this as one of the grand challenges of the 21st century. Daniel Esposito, assistant profes ... read more

Related Links
University of California - Davis
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