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Green Line (Mumbai Metro)
The Mumbai Metro Green Line is the designation of Lines 4 and 4A, a 32.32 km fully elevated corridor under construction from Wadala in central Mumbai to Kasarvadavali in Thane.
Green Line (Namma Metro)
The Green Line, also called the Namma Metro Green Line, is the North-South corridor (Line 2) of Bengaluru's metro, running from Madavara to Silk Institute.
Green Mark (building certification)
Green Mark is Singapore's green building rating system, launched by the Building and Construction Authority in January 2005 and the first green building rating system designed for the tropical climate.
Green Plains Inc.
Green Plains Inc. is an American renewable fuels and agricultural technology company based in Omaha, Nebraska. Founded in 2004, it produces ethanol, animal feed, and renewable corn oil from corn.
Green Ramp disaster
The Green Ramp disaster was a 1994 aviation accident at Pope Air Force Base, North Carolina, in which a fire killed 24 paratroopers of the 82nd Airborne Division.
Green roof
A green roof, also known as a living roof or eco-roof, is a building roof covered with vegetation planted in engineered growing medium over waterproofing, drainage, and root-barrier layers.
Green SM
Green SM, formerly Xanh SM, is a Vietnamese all-electric taxi and ride-hailing service operated by GSM, founded by Vingroup Chairman Pham Nhat Vuong in 2023.
Green Star (building rating system)
Green Star is an Australian sustainability rating and certification system for buildings, interior fitouts, and communities, administered by the Green Building Council of Australia since 2003, with more than 7,500 projects certified.
Green steel
Green steel is steel made with much lower greenhouse gas emissions than coal-based steelmaking, using electric arc furnaces or hydrogen-based direct reduction of iron ore.
Green strength
Green strength is the strength of an unfired compact of ceramic or metal powder, allowing fragile green bodies to be demoulded, machined, and handled before sintering.
Green wave
A green wave is a traffic signal coordination scheme timing successive intersections so a vehicle traveling at a set speed hits green lights without stopping.
Green-e
Green-e is a voluntary certification program administered by the non-profit Center for Resource Solutions, launched in 1997 as the first independent certification program for renewable electricity in North America.
Green-laser welding of copper
Green-laser welding of copper joins copper with visible green laser light around 515 nm, which copper absorbs far better than infrared, enabling stable, spatter-free welding.
Green-solvent processing of perovskite solar cells
Green-solvent processing of perovskite solar cells is the fabrication of these devices using low-toxicity solvents such as ethanol and GVL instead of hazardous DMF and NMP.
Green500
The Green500 is a biannual ranking of the world's most energy-efficient supercomputers by FLOPS per watt, published alongside the TOP500 and founded in 2006 at Virginia Tech.
Greencore
Greencore is an Irish convenience food manufacturer and the world's largest fresh pre-packed sandwich maker. It supplies major retailers with sandwiches, salads, and chilled ready meals.
Greene County Steam Plant
The Greene County Steam Plant, also called Plant Greene County, is an Alabama Power generating station near Demopolis, Alabama, on the Black Warrior River, opened in 1965.
Greenergy
Greenergy is a British fuel supply and renewable fuels company founded in 1992, supplying over 15 billion liters of fuel annually across the UK, Ireland, Canada, and France.
Greenfield Energy Centre
Greenfield Energy Centre is a 1,005 MW natural gas-fired combined cycle power plant in Courtright, Ontario, near Sarnia, built by Calpine and Mitsui for $600 million and one of Canada's largest gas-fired stations.
Greenfield project
A greenfield project is a new software or infrastructure initiative built from scratch without legacy constraints or technical debt, unlike a brownfield project, and often drifts into one over time.
Greenhills Coal Mine
Greenhills is an open-pit metallurgical coal mine near Elkford in the Elk Valley of southeastern British Columbia, producing about 6 Mt of steelmaking coal a year.
Greenhouse George
Greenhouse George was a 225-kiloton United States nuclear test at Enewetak Atoll on May 9, 1951, the third Operation GREENHOUSE shot and the first controlled thermonuclear burn on earth.
Greenleaf Whittier Pickard
Greenleaf Whittier Pickard (1877–1956) was an American electrical engineer who tested thousands of minerals at AT&T and patented the silicon crystal detector in 1906, a forerunner of the transistor.
GreenPro Ecolabel
GreenPro is India's Type 1 ecolabel for products, administered by the Confederation of Indian Industry since 2015, certifying life-cycle environmental performance across 63 product categories.
Greensea Systems
Greensea Systems, doing business as Greensea IQ, is an American marine robotics company in Richmond, Vermont, founded in 2006. It develops the OPENSEA vehicle platform and Bayonet amphibious crawling robots.
Greenshields model
The Greenshields model is a traffic flow model proposed by Bruce D. Greenshields in 1935 that assumes traffic speed decreases linearly with density, yielding a parabolic flow-density curve.
Greensville County power station
The Greensville County power station is a 1,588 MW natural gas-fired combined-cycle power station owned by Dominion Energy near Emporia, Virginia, that entered commercial operation in December 2018.
Greenvolt
Greenvolt is a Lisbon-based renewable energy group working in biomass, wind, solar, and storage; it listed on Euronext Lisbon in 2021 and has been wholly owned by KKR since late 2024.
Greenvolt Power
Greenvolt Power is the Portugal-based battery energy storage and renewables development arm of Greenvolt Group, owned by KKR since 2024; it inaugurated one of Poland's largest battery systems in July 2026.
Greenwich foot tunnel
The Greenwich foot tunnel, also known as Greenwich tunnel, is a pedestrian tunnel under the River Thames linking Greenwich with Millwall, opened in 1902 and free to use.