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  2. Light tube - Wikipedia

    en.wikipedia.org/wiki/Light_tube

    Light tubes (also known as solar pipes, tubular skylights or sun tunnels [1]) ... such products may have lower installation costs but do consume energy during use; ...

  3. Polytunnel - Wikipedia

    en.wikipedia.org/wiki/Polytunnel

    The nesting of row covers and low tunnels inside high tunnels is also common. [1] Superbay Polytunnel at Van Arnham Nurseries. Polytunnels can be used to provide a higher temperature and/or humidity than that which is available in the environment but can also protect crops from intense heat, bright sunlight, winds, hailstones, and cold waves.

  4. Concentrated solar power - Wikipedia

    en.wikipedia.org/wiki/Concentrated_solar_power

    A solar power tower at Crescent Dunes Solar Energy Project concentrating light via 10,000 mirrored heliostats spanning thirteen million sq ft (1.21 km 2). The three towers of the Ivanpah Solar Power Facility Part of the 354 MW SEGS solar complex in northern San Bernardino County, California Bird's eye view of Khi Solar One, South Africa

  5. Newsom administration unveils new $20-billion cost estimate ...

    www.aol.com/news/newsom-administration-unveils...

    A new analysis shows that building a California water tunnel would cost $20 billion. State officials say the project's benefits would far outweigh the costs.

  6. Cost estimate for Fulton tunnel project skyrockets 47% - AOL

    www.aol.com/news/cost-estimate-fulton-tunnel...

    The Stark County Park District voted to spend 47% more to proceed with the project to build a tunnel to connect Jackson High School and North Park.

  7. California's water tunnel to cost $20 billion. State ... - AOL

    www.aol.com/news/californias-water-tunnel-cost...

    The latest form championed by the Democratic governor is a single giant tunnel, down from two tunnels proposed by his predecessor, Jerry Brown. California's water tunnel to cost $20 billion. State ...