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Renewable Energy
Renewable energy (or green energy) is energy from renewable natural resources that are replenished on a human timescale. The most widely used renewable energy types are solar energy, wind power, and hydropower. Bioenergy and geothermal power are also significant in some countries. Some also consider nuclear power a renewable power source, although this is controversial. Renewable energy installations can be large or small and are suited for both urban and rural areas. Renewable energy is often deployed together with further electrification. This has several benefits: electricity can move heat and vehicles efficiently and is clean at the point of consumption.[1][2] Variable renewable energy sources are those that have a fluctuating nature, such as wind power and solar power. In contrast, controllable renewable energy sources include dammed hydroelectricity, bioenergy, or geothermal power.
Renewable energy systems have rapidly become more efficient and cheaper over the past 30 years.[3] A large majority of worldwide newly installed electricity capacity is now renewable.[4] Renewable energy sources, such as solar and wind power, have seen significant cost reductions over the past decade, making them more competitive with traditional fossil fuels.[5] In most countries, photovoltaic solar or onshore wind are the cheapest new-build electricity.[6] From 2011 to 2021, renewable energy grew from 20% to 28% of global electricity supply. Power from the sun and wind accounted for most of this increase, growing from a combined 2% to 10%. Use of fossil energy shrank from 68% to 62%.[7] In 2022, renewables accounted for 30% of global electricity generation and are projected to reach over 42% by 2028.[8][9] Many countries already have renewables contributing more than 20% of their total energy supply, with some generating over half or even all their electricity from renewable sources.[10][11]
The main motivation to replace fossil fuels with renewable energy sources is to slow and eventually stop climate change, which is widely agreed to be caused mostly by greenhouse gas emissions. In general, renewable energy sources cause much lower emissions than fossil fuels.[12] The International Energy Agency estimates that to achieve net zero emissions by 2050, 90% of global electricity generation will need to be produced from renewable sources.[13] Renewables also cause much less air pollution than fossil fuels, improving public health, and are less noisy.[12]
The deployment of renewable energy still faces obstacles, especially fossil fuel subsidies,[14] lobbying by incumbent power providers,[15] and local opposition to the use of land for renewable installations.[16][17] Like all mining, the extraction of minerals required for many renewable energy technologies also results in environmental damage.[18] In addition, although most renewable energy sources are sustainable, some are not.
Southampton (/saʊθˈ(h)æmptən/ ⓘ) is a port city in Hampshire, England. It is located approximately 80 miles (130 km) south-west of London, 20 miles (32 km) west of Portsmouth, and 20 miles (32 km) south-east of Salisbury.[6][7] Southampton had a population of 253,651 at the 2011 census, making it one of the most populous cities in southern England.[2] Southampton forms part of the larger South Hampshire conurbation which includes the city of Portsmouth and the boroughs of Havant, Eastleigh, Fareham, and Gosport. A major port,[8] and close to the New Forest, Southampton lies at the northernmost point of Southampton Water, at the confluence of the River Test and Itchen,[9] with the River Hamble joining to the south. Southampton is classified as a Medium-Port City.[10]
Southampton was the departure point for the RMS Titanic[11] and home to 500 of the people who perished on board.[12] The Spitfire was built in the city[13] and Southampton has a strong association with the Mayflower, being the departure point before the vessel was forced to return to Plymouth. In the past century, the city was one of Europe's main ports for ocean liners. More recently, Southampton is known as the home port of some of the largest cruise ships in the world.[14] The Cunard Line maintains a regular transatlantic service to New York from the city. Southampton is also one of the largest retail destinations in the South of England.[15]
Southampton was heavily bombed during the Second World War during what was known as the Southampton Blitz. It was one of the major embarkation points for D-Day. In the Middle Ages Southampton was where troops left England for the Battle of Agincourt. It was itself raided by French pirates, leading to the construction of the fortified town walls, many of which still stand today. Jane Austen also lived in Southampton for a number of years. In 1964, the town of Southampton acquired city status, becoming the City of Southampton.[16]
Some notable employers in the city include the University of Southampton, Ordnance Survey, BBC South, Associated British Ports, and Carnival UK.[17]
