Canada>Canada <a href=" http://www.qeiicc.co.uk/where-can-i-buy-xenical.pdf#oh ">xenical buy online</a> The conspiracy theory took root in the Nineties, with the publication of a US Air Force research paper about weather modification. The ability to change the weather isn&rsquo;t mere pie-in-the-sky. Cloud seeding &ndash; where particles such as silver oxide are sprayed onto clouds to increase precipitation &ndash; is commonly used by drought-prone countries, and was part of the Chinese government&rsquo;s efforts to reduce pollution ahead of the Beijing Olympics in 2008. Other proponents of the &ldquo;chemtrails&rdquo; theory say it is an attempt to control global warming, while some cite far more sinister goals, such as population control and military weapons testing.