{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-c03aa079.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-517835be.css\" media=\"all\" /\u003e\n\u003cdiv data-title='Renewable energy versus conservation' data-url='/boclips/videos/5c54bc4ed8eafeecae12ba5b' data-video-url='/boclips/videos/5c54bc4ed8eafeecae12ba5b' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nRenewable energy versus conservation\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"30356011\" href=\"/search?publisher_ids%5B%5D=30356011\"\u003eCurated Video\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eAust, England - February 19th, 20091. Pan across Severn Bridge in the mistCardiff, Wales  - February 19th, 20092. Wide shot of where the 10 mile barrage will cross - from Lavernock Point near Cardiff, Wales, to Brean Down, England,...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eAust, England - February 19th, 2009\u003cbr/\u003e1. Pan across Severn Bridge in the mist\u003cbr/\u003eCardiff, Wales  - February 19th, 2009\u003cbr/\u003e2. Wide shot of where the 10 mile barrage will cross - from Lavernock Point near Cardiff, Wales, to Brean Down, England, showing birds on the mud flats of the estuary\u003cbr/\u003e3. Mid of birds\u003cbr/\u003e4. Set up of Jane Davidson, Welsh Assembly Government minister for environment, sustainability and housing\u003cbr/\u003e5. Cutaway of papers\u003cbr/\u003e6. SOUNDBITE:  (English) Jane Davidson Welsh Assembly Government minister for environment.\u003cbr/\u003e \"In the Severn Estuary, we have the second highest tidal rise and fall in the world and therefore in many ways it is just crying out for that tide to be used.  And what we are doing as government is looking at the way in which we can harness the power of the Severn Estuary while also being responsible environmentally.\"\u003cbr/\u003e7. Set up of Roger Falconer, Director Hydro-environmental Research Centre, School of Engineering, Cardiff University, with a model of a barrage\u003cbr/\u003e8. Close up of model of barrage\u003cbr/\u003e9. Various set ups Roger Falconer\u003cbr/\u003e10. SOUNDBITE:  (English) Roger Falconer, Director Hydro-environmental Research Centre, School of Engineering, Cardiff University\u003cbr/\u003e\"There are huge energy resources, tidal energy resources, in this estuary , and it is very focused so you can get a lot of power from a very relatively confined location.  Two sides of the triangle, so to speak, are already in place from the coastlines so in that sense much of the empowerment is already in place.  It will have benefits in terms of flood defence because the structure will pose a restriction on the flow coming in from the sea so it will reduce the peak flow levels.\"\u003cbr/\u003eSlimbridge Wildfowl and Wetlands Trust, Gloucestershire - February 17th, 2009\u003cbr/\u003e11. Various of wading birds \u003cbr/\u003e12. Set up shot of Dr Debbie Pain, director of conservation, Slimbridge Wildfowl and Wetlands Trust\u003cbr/\u003e13. Wide, birds in flight\u003cbr/\u003e14. SOUNDBITE:  (English) Dr Debbie Pain, director of conservation, Slimbridge Wildfowl and Wetlands Trust\u003cbr/\u003e\"If the Cardiff-Weston barrage was built that would lead to a reduction in the amount of mud flats and other habitats exposed - up to three quarters of them.  So that option could potentially be very environmentally damaging, and we believe that there are lots of other options that could be less environmentally damaging that the government needs to really adequately and thoroughly explore.\"\u003cbr/\u003e15. Close up birds on grass\u003cbr/\u003e16. Set up of Roderick Leslie\u003cbr/\u003e17. SOUNDBITE (English) Roderick Leslie, ornithologist, Vox pop\u003cbr/\u003e\"personally, I think that the option that would simply dam the whole estuary, and would completely wipe out the habitats of birds, is not the one that we should be going for.  I think it's very 1960s, I think it's a massive piece of engineering and surely we can do a bit better than that now.\"\u003cbr/\u003e18. Various of birds on water \u003cbr/\u003e19. SOUNDBITE (English) Barbara Jordan, ornithologist, Vox pop \u003cbr/\u003e\"Something has to be done to use the water power in the river, but it has to be carefully thought out because of all the birds that have been here for hundreds, and over a thousand years - the geese have been coming to this area.\"\u003cbr/\u003e20. Various of birds \u003cbr/\u003eLavernock Point, near Cardiff - February 19th, 2009\u003cbr/\u003e21. Set up shot of Neil Crumpton, Friends of the Earth, at Lavernock Point, near Cardiff\u003cbr/\u003eUPSOUND: (English) Neil Crumpton, Friends of the Earth\u003cbr/\u003e\" This area here is Lavernock Point. This is on the South Wales side of the estuary.\"\u003cbr/\u003e22. Cutaway of water at shoreline\u003cbr/\u003e23. SOUNDBITE: (English)  Neil Crumpton, Friends of the Earth\u003cbr/\u003e\"In terms of the alternatives to a barrage, there are several types of schemes-  be it off-shore lagoons, land-connected lagoons, reefs and tidal stream turbines, and we believe that some combination of these technologies would be a more appropriate way to harness the power of the Severn Estuary.\"\u003cbr/\u003eCardiff - February 19th, 2009\u003cbr/\u003e24. SOUNDBITE: (English) Roger Falconer, Director Hydro-environmental Research Centre, School of Engineering, Cardiff University\u003cbr/\u003e\"I think the problems of climate change are enormous.  I think that the vast majority of us still don't understand how massive a problem we are going to face.  And I think we need to do everything we possibly can - and the barrage is just one - alongside wind turbines, tidal stream turbines and so forth, one of many major projects which we are going to have to take to address the challenges to climate change.\"\u003cbr/\u003eSlimbridge, Gloucestershire - February 17th, 2009 \u003cbr/\u003e25. Birds at Slimbridge\u003cbr/\u003eLavernock Point, near Cardiff - February 19th, 2009\u003cbr/\u003e26. SOUNDBITE: (English) Neil Crumpton, Friends of the Earth\u003cbr/\u003e\"This is not only an environmentally risky project, it is also an economically risky project.  The La Rance Barrage in France is about a twentieth of the scale of this proposal.  It's never been done at this scale before, so there are engineering challenges which would have to be surmounted which would incur economic risks. \u003cbr/\u003e27. Close up of shoreline \u003cbr/\u003eCardiff - February 19th, 2009\u003cbr/\u003e29. SOUNDBITE:  (English) Jane Davidson Welsh Assembly Government minister for environment, sustainability and housing\u003cbr/\u003e\"We all have a fairly big vision about what we want to see appropriately dealt with in the Severn, but no single scheme has government support.  \u003cbr/\u003eAust, England - February 29th, 2009\u003cbr/\u003e30. View of Second Severn Bridge\u003cbr/\u003eIt's a battle of green energy versus conservation. \u003cbr/\u003eThe Severn estuary is the proposed site of a massive renewable energy project. \u003cbr/\u003eIn one corner are the conservationists who want to protect the bird-filled marshes and mudflats of the estuary. \u003cbr/\u003eIn the other are environmentalists who want to build a mega-dam to generate clean power. \u003cbr/\u003eThe gigantic scale of the project has only increased the stakes.\u003cbr/\u003eIn this broad grey estuary, where thousands of migratory birds shelter and wildlife lovers walk, it's a battle of nature versus the future.\u003cbr/\u003eSlimbridge is a nature reserve the size of New York's Central Park at the mouth of the Severn river. \u003cbr/\u003eThe proposed dam, one of a shortlist of five green energy proposals, would be made up of a 10 mile (17 kilometre) long wall built across the Severn Estuary. \u003cbr/\u003eThe wall would hold back the immense tides, then release the water through a series of turbines to generate electricity.\u003cbr/\u003eJane Davidson is the Welsh Assembly Government's minister for environment.\u003cbr/\u003eShe says the estuary's immense tidal rise and fall means it is a perfect place to develop hydro electric power. \u003cbr/\u003eBut she says that the government \"is looking at the way in which we can harness the power of the Severn Estuary while also being responsible environmentally.\"\u003cbr/\u003eRoger Falconer, director of the Hydro-environmental Research Centre at Cardiff University, says the barrage would exploit tidal energy resources. \u003cbr/\u003eHe says the estuary can provide a \"lot of power from a relatively confined location.\"\u003cbr/\u003eFalconer adds that it would act as a flood defence as well as helping to clean the muddy water of the estuary.\u003cbr/\u003eBut some environmental groups say the 20 billion pound ($28 billion) Cardiff-Weston project could destroy precious mudflats and Atlantic salt marshes that sustain ducks, swans and geese.\u003cbr/\u003eConservationists, who want to preserve natural habitats for wildlife, say much of the land is irreplaceable, especially at the Slimbridge reserve. \u003cbr/\u003eThis peaceful stretch of marshland about 120 miles (nearly 200 kilometres) west of London, is one of the country's most popular reserves, attracting hundreds on sunny days. \u003cbr/\u003eDr Debbie Pain is director of conservation at Slimbridge Wildfowl and Wetlands Trust. \u003cbr/\u003eShe says the proposed barrage may reduce the mud flats by upto three quarters. \u003cbr/\u003ePain says the government should explore other options. \u003cbr/\u003eLocal birds potters bring flasks of tea and sandwiches wrapped in paper and sit for hours in wooden hides or sheds, watching kingfishers and curlews through the mist. \u003cbr/\u003eOrnithologists are also urging the government to be cautious and consider the fate of the thousands of birds that winter here. \u003cbr/\u003eConservationists worry that a dam downstream would disturb the tides that bring in food for the 60,000 migratory and wintering birds each year.\u003cbr/\u003eNeil Crumpton of Friends of the Earth says they want the government to consider a smaller system of tidal \"reefs\" _ reversible turbines placed on the estuary floor to generate power while the tide moves in and out.\u003cbr/\u003eThough small tidal mills were used to generate power in southern England since the Middle Ages, the potential for environmental degradation has hampered further construction _ and discouraged larger projects.\u003cbr/\u003eA report by the World Energy Council said there are several suitable sites in the world but that large capital costs and environmental impact have made politicians hesitate.\u003cbr/\u003eEven so, the Severn project would be the biggest of its kind. \u003cbr/\u003eFalconer says that the problems of climate change means that we need to think 'big' to address the challenges of the future. \u003cbr/\u003eBritain plans to derive 15 percent of its energy from renewables by 2020, and a successful tidal power plan here could generate up to 8.6 gigawatts of power or the equivalent of eight coal-fired power stations _ or 5 percent of Britain's needs.\u003cbr/\u003eA similar plant at La Rance in northern France built in the 1960s, is comparable, but the dam there generates just 240 megawatts of electricity _ 35 times less than what Severn could do.\u003cbr/\u003eSince there's little to compare it too, no one is exactly sure what the impact of the Severn dam will be. \u003cbr/\u003eThe government acknowledges the project could wipe out 20,000 hectares (nearly 50,000 acres) along the estuary but promises to set land aside elsewhere to compensate. \u003cbr/\u003eThe Royal Society for the Protection of Birds also says that the dam will harm the estimated 30,000 salmon and other fish that swim through the broad estuary to reach their spawning grounds in adjacent rivers.\u003cbr/\u003eThe dam could also effect local industry. \u003cbr/\u003eAround 20 miles (30 kilometres) down river from Slimbridge, operators at the deep-water port in the industrial city of Bristol fear the project could reduce water levels and limit the amount of ships coming in.\u003cbr/\u003eUnwilling to commit to either side, the government has now agreed to fund further research into tidal reefs, while continuing consultations on other smaller projects, which include proposals for smaller dams at narrower points of the estuary, and for tidal lagoons _ smaller scale turbines that operate with less water.\u003cbr/\u003eA government-backed study aims to select one of the projects next year.\u003cbr/\u003eDavidson says that the Welsh government has not yet committed to any of the proposals being considered. \u003cbr/\u003eBut with a UK wide election likely next year, a decision on such a massive project is unlikely soon\u003cbr/\u003eWhile the debate rages on, the moorhens, oyster catchers and white fronted geese continue to waddle and swoop  in the rich Slimbridge mud _ while they still can.\u003cbr/\u003eThe plans for the dam on the border between England and Wales highlights the tensions between the collision of two environmentally sensitive goals _ protecting wildlife versus reducing dependence on fossil fuels.\u003cbr/\u003e\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='action-container flex justify-between'\u003e\n\u003cbutton aria-expanded='false' aria-label='Read more description' class='rp-full-description' type='button'\u003e\n\u003ci class='fai fa-solid fa-align-left'\u003e\u003c/i\u003e\n\u003cspan id='read_more'\u003eRead More\u003c/span\u003e\n\u003c/button\u003e\n\u003cdiv class='rp-report'\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv aria-labelledby='resource-details-heading' class='rp-info-section'\u003e\n\u003ch2 class='title' id='resource-details-heading'\u003eResource Details\u003c/h2\u003e\n\u003cdiv 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class='title sr-only' id='educator-ratings-heading'\u003eEducator Ratings\u003c/h2\u003e\n\u003cdiv id=\"educator-ratings-root\"\u003e\u003c/div\u003e\u003cdiv id=\"all-educator-ratings-root\"\u003e\u003c/div\u003e\u003cdiv id=\"educator-rating-form-root\"\u003e\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-resource'\u003e\n\u003cdiv aria-label='Show resource details' class='rp-show-info' role='button' tabindex='0'\u003e\n\u003ci class='fai fa-solid fa-align-left'\u003e\u003c/i\u003e\nShow resource details\n\u003c/div\u003e\n\u003cdiv aria-label='Video player' class='player' id='player-wrapper' role='region'\u003e\n\u003cdiv class='relative container mx-auto' id='lp-boclips-visitor-thumbnail'\u003e\n\u003ca class=\"block\" data-html=\"true\" data-placement=\"bottom\" data-trigger=\"click\" data-content=\"\u003cdiv class=\u0026quot;text-center py-2\u0026quot;\u003e\u003ca class=\u0026quot;bold\u0026quot; href=\u0026quot;/auth/users/sign_in\u0026quot;\u003eSign 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