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<div id='article-page'><div id='article-content' data-media-url='//news-app-staging.s3.amazonaws.com' data-base-url='//news-app-staging.herokuapp.com' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/7b60e3d4-0c97-4c8b-bd7e-7e86bff1b20d_hq.wav' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Salt Batteries Could Be Major Step in Move Away from Fossil Fuels' data-article-id='3856'><script src='//news-app-staging.herokuapp.com/javascripts/getscripts.js'></script><link rel='stylesheet' href='//news-app-staging.herokuapp.com/stylesheets/article.css' type='text/css' /><div class='article'><p><span data-start-time='0' data-end-time='13729'>At a power station in Berlin, Germany, visitors find a shining piece of machinery that looks out of place in the building.</span> <span data-start-time='13729' data-end-time='26083'>Its silver pipes and containers hold a substance that reportedly could become a major ingredient for producing power in the future.</span> <span data-start-time='26083' data-end-time='39271'>Vattenfall, the station&rsquo;s operator, says this form of energy would not depend on traditional fossil fuels, such as oil or coal.</span> <span data-start-time='39271' data-end-time='50021'>The company, working with a Swedish company called SaltX, is testing the use of salt to store heat.</span> <span data-start-time='50021' data-end-time='55063'>Yet it is not the kind of salt you add to food.</span> <span data-start-time='55063' data-end-time='61958'>Heat-produced energy represents more than the half the power Germany uses.</span> <span data-start-time='61958' data-end-time='77521'>If it works well, the salt-based energy storage system could help solve a problem presented by renewable energy sources, such as wind and the sun&rsquo;s energy.</span> <span data-start-time='77521' data-end-time='85125'>The problem is that renewable energy sources are not completely dependable.</span> <span data-start-time='85125' data-end-time='91479'>They sometimes make too much, and sometimes too little power.</span> </p></div><div class='control-buttons-sticky' style='display:none;'><div class='control-buttons'><button title='Back' class='back' disabled='disabled'></button><button title='Play' class='play' disabled='disabled'></button><button title='Pause' class='pause' style='display:none;'></button><button title='Forward' class='forward' disabled='disabled'></button><button class='finished-reading' style='display:none;'>Done</button></div></div></div><div id='article-media'><div id='media-image'><img src='https://news-app-production.s3.amazonaws.com/articles/3343/031D561B-B9DF-4EFC-B8A9-61B4956CC4DC_w1023_r1_s.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=12910 data-hint-location='61958' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/what_does_renewable_mean.wav'>What does renewable mean?</div><div class='choices' data-correct-choice='restored or replaced by natural processes'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/a_chain_of_grocery_stores.wav'><span>a chain of grocery stores</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/related_to_marriage.wav'><span>related to marriage</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/restored_or_replaced_by_natural_processes.wav'><span>restored or replaced by natural processes</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/relating_to_the_stock_market.wav'><span>relating to the stock market</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=12911 data-hint-location='77521' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/the_problem_is_that_renewable_energy_sources_are_not_completely_what.wav'>The problem is that renewable energy sources are not completely what?</div><div class='choices' data-correct-choice='dependable'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/coded.wav'><span>coded</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/shut_down.wav'><span>shut down</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/built.wav'><span>built</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/dependable.wav'><span>dependable</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=12912 data-hint-location='85125' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/they_sometimes_make_too_much_and_sometimes_too_little__blank_.wav'>They sometimes make too much, and sometimes too little <span class='blank'>power</span>.</div><div class='choices' data-correct-choice='power'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/food.wav'><span>food</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/power.wav'><span>power</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/sunlight.wav'><span>sunlight</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/3343/water.wav'><span>water</span></div></div></div><div class='question-buttons'><button class='skip-button'></button><button 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