A rooftop solar power system, or rooftop PV system, is a photovoltaic (PV) system that has its electricity-generating solar panels mounted on the rooftop of a residential or commercial building or structure. The various components of such a system include photovoltaic modules, mounting systems, cables, solar inverters…

A pallet (also called a skid) is a flat transport structure, which supports goods in a stable fashion while being lifted by a forklift, a pallet jack, a front loader, a jacking device, or an erect crane. Many pallets can handle a load of 1,000 kg (2,200 lb).

Leadership in Energy and Environmental Design (LEED) is a green building certification program used worldwide. Developed by the non-profit U.S. Green Building Council (USGBC), it includes a set of rating systems for the design, construction, operation, and maintenance of green buildings, homes, and neighborhoods,…

Agriculture in the United Kingdom uses 69% of the country's land area, employs around 446,000 people and contributes 0.6% of its gross value added (£15.9 billion). The UK currently produces about 60% of its domestic food consumption.

In the United States, the Great Depression is commonly (though not universally) dated to the Wall Street crash of October 1929. The nadir came in 1931–1933, and recovery came in 1940.

An elevator (North American English, Philippine English) or lift (Commonwealth English except Canada) is a machine that vertically transports people or freight between levels. They are typically powered by electric motors that drive traction cables and counterweight systems such as a hoist, although some pump…

Glass production involves two main methods – the float glass process that produces sheet glass, and glassblowing that produces bottles and other containers. It has been done in a variety of ways during the history of glass.

The Chrysler Building is a 1,046-foot-tall (319 m), Art Deco-style supertall skyscraper in the East Midtown neighborhood of Manhattan, New York City, United States. Located at the intersection of 42nd Street and Lexington Avenue, it is the tallest steel-framed brick building in the world.

The economic history of the United States spans the colonial era through the 21st century. The initial settlements depended on agriculture and hunting/trapping, later adding international trade, manufacturing, and finally, services, to the point where agriculture represented less than 2% of GDP. Until the end of the…

Robotics is the interdisciplinary study and practice of the design, construction, operation, and use of robots. A roboticist is someone who specializes in robotics.