Waste could generate up to 7 percent of electricity in Spain

Researchers from the University of Zaragoza (UNIZAR) have calculated the energy and economic potential of urban solid waste, sludge from water treatment plants and livestock slurry for generating electricity in Spain. These ...

Mixed water portfolio helps thirsty cities

(PhysOrg.com) -- Computer simulations for drought-prone areas reveal that when urban water planners combine three approaches of buying water -- permanent rights, options and leases -- the city avoids surplus water and high ...

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