Medical experts advise the public on the importance of wearing sunglasses to protect the eyes from UV; for adequate protection, experts recommend sunglasses that reflect or filter out 99-100% of UVA and UVB light, with wavelengths up to 400 nm.
In 2008, 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.
However, none comes close to the degree of round-the-clock damage inflicted on the biosphere as the DARPA-sponsored program of geo-engineering. Posted on September 11, 2013 by cosmicconvergence.org. Just one component of this secret geo-engineering program is known as chemtrails.