The Obama administrations announcement to explore geo-engineering the environment in the name of preventing global warming has given fresh impetus to concerns about whether such programs are already underway in the guise of chemtrails. Chemtrails differ from ordinary contrails in that they hang in the sky for hours and are often observed to be emitted from planes that fly criss-cross routes, leading to the formation of X and grid-like patterns in the sky. Chemtrails also directly effect localized weather by turning a clear blue sky into a hazy overcast. Last year, a KSLA news investigation found that a substance that fell to earth from a high altitude chemtrail contained high levels of Barium (6.8 ppm) and Lead (8.2 ppm) as well as trace amounts of other chemicals including arsenic, chromium, cadmium, selenium and silver. Of these, all but one are metals, some are toxic while several are rarely or never found in nature. The newscast focuses on Barium, which its research shows is a hallmark of chemtrails. KSLA found Barium levels in its samples at 6.8 ppm or more than six times the toxic level set by the EPA. KSLA also asked Mark Ryan, Director of the Poison Control Center, about the effects of Barium on the human body. Ryan commented that short term exposure can lead to anything from stomach to chest pains and that long term exposure causes blood pressure problems. The Poison Control Center further reported that long-term exposure, as with any harmful substance, would …