John Doe –
Building standards are being improved greatly, but that does not account for all the existing ones, nor for the big increase in insulating materials needed. A builder whom you might expect would find it profitable, once told me that increasing the insulation of individual homes reaches a point where it is actually less "green" than it seems. (He also frankly admitted it would be too costly and wasteful to fit his own home, a 1930s ex-Council unit, with a heat-pump, despite no labour-charges – not something you'd expect to hear from an accredited plumber!)
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Steam locomotives are indeed very inefficient but I am not sure they are relevant here. Nice to watch though!
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Solar "farms" in fields: apart from unsightly, the serious objection is taking very large areas of land that should be producing food, for relatively low output for their scale. There is also some NIMBY speculation here by the builders choosing rural areas far for their intended customers in London or other major cities. They also turn the land from agricultural to industrial use, for tax purposes, an important point for landowners to consider.
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Tidal Flow (submarine equivalent of wind-turbines) – I agree. Actually British firms are among the word's best at designing these but we've governments set on wind and sunlight, so not encouraging them. I think a tidal-flow scheme is being built by the Shetlanders?
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Re(?)-foresting. Apart from aesthetics, this is already encouraging swathes of ecologically harmful, monocultured, import-species pines in neat rows, by major companies with no interest in the countryside or the environment at large, just for "carbon-trading" and "green" posturing. A lot of the Welsh and Northern English moors are also sheep-grazing land.
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Ground-source heat-pumps next to every house? Fine until one cold day your heating all goes off because your pump has extracted heat from the ground much more rapidly than its natural replacement rate. Even worse when every home along the road has the same installation. Although not affected by cold fronts as I imagine an air heat-pump could be, this depletion, analogous to pumping a water-well dry, may be why we don't hear much about ground heat-pumps. Also, as with air ones, the maximum amount of heat energy and its temperature would be quite low, few existing homes are suited to it, and installing one could mean replacing the entire heating-system and putting in masses more insulation.
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New homes next to railways, with new stations (by your suggestion, potentially one every mile!). Hard to see how that can be achieved. Such ribbon-development, like most NIMBY (i.e. not in the speculator's back yard) estates now, would take no account of local geography, needs, services, other transport, etc. There are sprawling housing-estates being built around the country, within a few miles of existing main-line stations, but aimed mainly at London commuters, even 100 miles from the capital. A billboard I saw advertising a new estate near Banbury boasted of its 45-minute train times from there to London.
(Brimsmore Estate's 3000 houses, just outside Yeovil, was advertised by double-page spreads in the London Evening News. A friend, a local man, living in Yeovil told me there is very little local employment available for such estates, but by train it is about 100 miles from London and 50 from Bristol, the latter offering the more efficient rail route from the South-West to Wales, most of England and Scotland.)
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Re-opening branch-lines closed not by Dr. Beeching but by a government wanting to do that. He was the consultant: it was really the Ernest Marples Plan, after the Minister of Transport who held a lot of shares in a motorway-building company and thought the future lay in road transport anyway. I think Barbara Castle managed to rein the anti-rail lobby in a bit.
This is good idea where possible, and a few have been rebuilt as Network Rail, not heritage, lines. It is not practical in most cases because under the plan, British Railways rapidly sold key areas – junctions, stations and lengths of track-bed – for development of buildings and roads, precisely to prevent any future re-opening.
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"National, integrated plan." What, as if by a joined-up government?
Fortunately we are not China, even if we do give away vital assets to it. Unfortunately though we lack that nation's ability or will to make long-term, integrated plans based on governments of (in our, not its, case) all hues thinking ahead and understanding anything related to science, engineering and business. (Knowing only Annual Accounts and Dividends, is not good enough!)
Some while ago I read HS2's official web-site. I do not know if the management has improved since, but not one of its named Directors was an Engineer, let alone anyone with any stated railway building, operating or service-selling experience. They were all support staff, necessary but still support roles: legal, personnel, accounts. Oh, and some mystery magisterium called "Director of Strategic Partnerships". I rest my case.