Problem: This article: The seabed contains enormous reserves of minerals which can be exploited by dredging. This has advantages over land-based mining in that equipment can be built at specialised shipyards and infrastructure costs are lower. Disadvantages include problems caused by waves and tides, the tendency for excavations to silt up and the washing away of spoil heaps. There is a risk of coastal erosion and environmental damage. Seafloor massive sulphide deposits are potential sources of silver, gold, copper, lead and zinc and trace metals since their discovery in the 1960s. They form when geothermally heated water is emitted from deep sea hydrothermal vents known as "black smokers". The ores are of high quality but prohibitively costly to extract. Small scale mining of the deep sea floor is being developed off the coast of Papua New Guinea using robotic techniques, but the obstacles are formidable.There are large deposits of petroleum, as oil and natural gas, in rocks beneath the seabed. Offshore platforms and drilling rigs extract the oil or gas and store it for transport to land. Offshore oil and gas production can be difficult due to the remote, harsh environment. Drilling for oil in the sea has environmental impacts. Animals may be disorientated by seismic waves used to locate deposits, probably causing the beaching of whales. Toxic substances such as mercury, lead and arsenic may be released. The infrastructure may cause damage, and oil may be spilt.Large quantities of methane clathrate exist on the seabed and in ocean sediment at a temperature of around 2 C (36 F) and these are of interest as a potential energy source. Some estimates put the amount available at between one and 5 million cubic kilometres (0.24 to 1.2 million cubic miles). Also on the seabed are manganese nodules formed of layers of iron, manganese and other hydroxides around a core. In the Pacific these may cover up to 30 percent of the deep ocean floor. The minerals precipitate from seawater and grow very slowly. Their commercial extraction for... contains an answer for the question: In the Pacific, what may cover up to 30 percent of the deep ocean floor?, what is it ?

A: manganese nodules

Problem: Given the question: This article: In mid-1917 nine-year-old Frances Griffiths and her motherboth newly arrived in the UK from South Africawere staying with Frances' aunt, Elsie Wright's mother, in the village of Cottingley in West Yorkshire; Elsie was then 16 years old. The two girls often played together beside the beck (stream) at the bottom of the garden, much to their mothers' annoyance, because they frequently came back with wet feet and clothes. Frances and Elsie said they only went to the beck to see the fairies, and to prove it, Elsie borrowed her father's camera, a Midg quarter-plate. The girls returned about 30 minutes later, "triumphant".Elsie's father, Arthur, was a keen amateur photographer, and had set up his own darkroom. The picture on the photographic plate he developed showed Frances behind a bush in the foreground, on which four fairies appeared to be dancing. Knowing his daughter's artistic ability, and that she had spent some time working in a photographer's studio, he dismissed the figures as cardboard cutouts. Two months later the girls borrowed his camera again, and this time returned with a photograph of Elsie sitting on the lawn holding out her hand to a 1-foot-tall (30 cm) gnome. Exasperated by what he believed to be "nothing but a prank", and convinced that the girls must have tampered with his camera in some way, Arthur Wright refused to lend it to them again. His wife Polly, however, believed the photographs to be authentic. Towards the end of 1918, Frances sent a letter to Johanna Parvin, a friend in Cape Town, South Africa, where Frances had lived for most of her life, enclosing the photograph of herself with the fairies. On the back she wrote "It is funny, I never used to see them in Africa. It must be too hot for them there."The photographs became public in mid-1919, after Elsie's mother attended a meeting of the Theosophical Society in Bradford. The lecture that evening was on "fairy life", and at the end of the meeting Polly Wright showed the two fairy photographs taken by her daughter and niece to the... contains an answer for the question: What is the first name of the friend that the little girl who took a picture with four fairies?, what is it ?
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The answer is:
Johanna

[Q]: This article: At the outbreak of the First World War, Holst tried to enlist but was rejected as unfit for military service. He felt frustrated that he could not contribute to the war effort. His wife became a volunteer ambulance driver; Vaughan Williams went on active service to France as did Holst's brother Emil; Holst's friends the composers George Butterworth and Cecil Coles were killed in battle. He continued to teach and compose; he worked on The Planets and prepared his chamber opera Savitri for performance. It was first given in December 1916 by students of the London School of Opera at the Wellington Hall in St John's Wood. It attracted no attention at the time from the main newspapers, though when professionally staged five years later it was greeted as "a perfect little masterpiece." In 1917 he wrote The Hymn of Jesus for chorus and orchestra, a work which remained unperformed until after the war.In 1918, as the war neared its end, Holst finally had the prospect of a job that offered him the chance to serve. The music section of the YMCA's education department needed volunteers to work with British troops stationed in Europe awaiting demobilisation. Morley College and St Paul's Girls' School offered him a year's leave of absence, but there remained one obstacle: the YMCA felt that his surname looked too German to be acceptable in such a role. He formally changed "von Holst" to "Holst" by deed poll in September 1918. He was appointed as the YMCA's musical organiser for the Near East, based in Salonica. contains an answer for the question: Who wrote a work which remained underperformed until after the war?, what is it ?
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[A]:
Holst