Mauro Oliveira, webmaster of http://www.geoengineeringwatch.org/ said that aluminum became a concern to many after the American Association for the Advancement of Science (AAAS) meeting when independent journalists sent shockwaves around the world after breaking the story of scientists discussing the plausibility of spraying 10 to 20 mega-tons of aluminum into the sky in SAG campaigns. Francis Mangels, a retired USDA/USFS Biologist commented on the use of aluminum by saying, “although aluminum is an abundant element, it does not exist naturally in the environment in free form. Dispersing massive amounts of ultra-fine aluminum particulates as proposed by geo-engineers into the stratosphere would have unquantifiable human health and environmental impacts”. When scientists were asked about the risks associated with the use of aluminum sprayed as an aerosol in SAG programs, they admitted that they have only begun to research aluminum and have published nothing. They also admitted that something terrible could be found in the future that they don’t know about. Also, when asked about deployment of current programs, scientists denied that any SAG programs have been deployed. This contradicted the findings of many who claim that SAG programs are well under-way and that high amounts of aluminum and other harmful substances from these programs are being found resulting in the devastation of eco-systems and the health of people around the world.