Dutch entrepreneur Boyan Slat has a more ambitious vision. The &amp;lt;a href=&amp;quot;http://www.boyanslat.com&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;21-year-old&amp;lt;/a&amp;gt; has designed a huge trash-eating machine that he intends to deploy at the Great Pacific Garbage Patch. He believes it can remove 99% of the debris within 30 years.