Polycrystalline silicon, or multicrystalline silicon, also called polysilicon, poly-Si, or mc-Si, is a high-purity, polycrystalline form of silicon, used as a raw material by the solar photovoltaic and electronics industry. Polysilicon is produced from metallurgical grade silicon by a chemical purification process,…

Mass surveillance in the People's Republic of China (PRC) is the network of monitoring systems used by the Chinese Communist Party (CCP) and government to monitor its citizens. China maintains the largest and most sophisticated mass surveillance system in the world.

Renewable energy in Spain, consisting of bioenergy, wind, solar, and hydro sources, accounted for 25.0% of the Total Energy Supply (TES) in 2023. In the same year, the share of electricity generated from renewable sources reached 50.3%, reflecting the country's progress towards its decarbonisation goals.

Engineering is the practice of systematically applying natural science and mathematics to design and improve systems, devices, or processes that solve problems under constraints. It is typically motivated by satisfying human needs, resulting in creations such as bridges, engines, smartphones, pacemakers, the internet,…

Energy in Iraq plays a crucial role in both the national economy and the global energy markets due to the country's vast oil reserves and significant status within the Organization of the Petroleum Exporting Countries (OPEC). Iraq holds abundant oil and gas resources and has strong solar PV potential.

An autonomous building is a hypothetical building designed to be operated independently from infrastructural support services such as the electric power grid, gas grid, municipal water systems, sewage treatment systems, storm drains, communication services, and in some cases, public roads. The literature mostly refers…

Canada has access to all main sources of energy including oil and gas, coal, hydropower, biomass, solar, geothermal, wind, marine and nuclear. It is the world's second largest producer of uranium, third largest producer of hydro-electricity, fifth largest natural gas producer, and the fifth largest producer of crude…

Targray Technology International Inc., commonly referred to as Targray, is a Canadian multinational materials distributor headquartered in Kirkland, Quebec that provides commodities and distribution of pulses, biofuel, cotton, carbon trading, lithium-ion battery, energy storage, and solar photovoltaics. Targray was…

Net metering (or net energy metering, NEM) is an electricity billing mechanism that allows consumers who generate some or all of their own electricity to use that electricity anytime, instead of when it is generated. This is particularly important with renewable energy sources like wind and solar, which are…

The Delhi Metro is a rapid transit system that serves Delhi and the adjoining satellite cities of Faridabad, Gurugram, Ghaziabad, Noida, Bahadurgarh, and Ballabhgarh in the National Capital Region of India. The system consists of 10 colour-coded lines serving 271 stations, with a total length of 374.466 km (232.682…