Related Links: Green Building Information Gateway Energy Star Sustainability leaders are praising a new search engine for green-building data, calling it a crucial tool for making informed design decisions and crafting government policy. The Green Building Information Gateway (gbig.org) aggregates and assesses design and performance data for thousands of buildings worldwide, collected under the popular green-building rating system called LEED. The site is free to users."GBIG organizes and enhances transparency of building-sustainability efforts," says Barry Hooper, green-building program coordinator, San Francisco Dept. of the Environment. "As a transparency tool, GBIG supports effective decisions and competition among real estate owners, enhances
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.