21 May 2017Popular
Methane released from frozen permafrost trapped as bubbles within ice. NASA
Japan and China have successfully extracted methane hydrate—ice crystals with natural methane gas locked inside—from the ocean floor near their coastlines.
<p><span></span>According to the <a href="https://apnews.com/9e45285b36f9481ea686b5fe683cc0f1/China,-Japan-extract-combustible-ice-from-seafloor" target="_blank">Associated Press</a>, a drilling crew in Japan successfully extracted methane hydrate on May 4 near the Shima Peninsula. Similarly, <a href="http://www.shanghaidaily.com/nation/China-succeeds-in-mining-combustible-ice-in-South-China-Sea/shdaily.shtml" target="_blank">Xinhua</a> reported that a Chinese drilling rig extracted the fuel in the South China Sea on Thursday, with Chinese Minister of Land and Resources Jiang Daming heralding the event as a breakthrough that could spearhead a "global energy revolution." </p><p>Methane hydrate is created by organic matter decomposing under the ocean floor and is often called "combustible ice" because it can be lit on fire. It also happens to be one of world's most abundant fossil fuels. </p><p><span></span>As the AP reports, between 280 trillion cubic meters (10,000 trillion cubic feet) to 2,800 trillion cubic meters (100,000 trillion cubic feet) of it is trapped under permafrost and in seas around the Earth's continental shelves—meaning the fuel could meet global gas demands for 80 to 800 years at current consumption rates. In comparison, total natural gas production worldwide was only 3.5 billion cubic meters (124 billion cubic feet) in 2015. </p><p>While commercial development of methane hydrate is still decades away, it's no wonder that many countries and the fossil fuel industry are so excited by it. The U.S., Canada, India and South Korea are <a href="http://www.bbc.com/news/business-27021610" target="_blank">also pursuing</a> the fuel. The U.S. Energy Department has <a href="https://energy.gov/articles/new-methane-hydrate-research-investing-our-energy-future" target="_blank">pumped millions</a> into researching the hydrocarbon.</p><p>However, unlocking the globe's vast swaths of methane buried deep in the sea has a number of risks. First, it can be costly and difficult. Japan, for instance, has <a href="http://energyskeptic.com/2014/methane-hydrates/" target="_blank">invested around $700 million</a> on methane-hydrate R&D over the past decade, getting only $16,000 worth of natural gas in return. In 2013, Japan stopped an effort to extract the fuel because sand from the seafloor was clogging their machinery. </p><p>And although we often talk about carbon dioxide being a <a href="http://www.ecowatch.com/climate-change/">climate change</a> villain, methane hydrate is much, much worse—about <a href="http://energyskeptic.com/2014/methane-hydrates/" target="_blank">23 times more</a> potent as a heat-trapping gas. If methane escaped or leaked during the extraction process, it could significantly increase greenhouse gas emissions.<br></p><p>It's already worrisome that the world's rising temperatures are <a href="http://www.ecowatch.com/siberia-permafrost-methane-bubbles-2323437986.html">causing permafrost to thaw</a>, which is releasing methane. Now, countries are actively drilling into the world's seabeds to harvest this potentially dangerous fuel. </p><p>David Sandalow, a former senior official with the U.S. State Department now at Columbia University's Center on Global Energy Policy, told the AP that the fuel could displace renewables such as solar and wind power.</p>
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