The results of recent field trials of rechargeable community solar lighting kits for isolated villages now are being analyzed to help researchers in New York City turn their inventions into a sustainable business plan. Photo: Courtesy of the SociaLite Project Charging station does 13 LED lamps at once. The lighting kits contain the electronics to build 80 lanterns, but the rest of the materials are locally sourced. Lamp bases are made from used cans, gourds or sections of bamboo. Translucent plastic juice bottles provide the diffusers. “This is changing people’s lives,” says Toby Cumberbatch, a professor at the Cooper Union
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.