Robotic sailboats are now being built. Their purpose- to clean oil spills. These boat-bots have taken up to three percent out of the Gulf of Mexico so far. The reason why the process is so slow is because they only have "skimmers," that skim the upper parts of the water. This un-manned boat is also very good because nobody has to go out to the waste area and get intoxicated with the fumes and the mess. Also, these robotic boats are very hard to make and require a large amount of money to build. However, once we can accomplish the feat of making one that can actually take out large amounts of oil, the results will be unbelievable.
http://www.cnn.com/2011/10/20/tech/motherboard-sailing-drone/index.html
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