This article: http://www.prisonplanet.com/geoengineering-our-environment-under-attack.html Is basically a re-hashing of old material. About half the article discusses the variety of concerns regarding geoengineering. While this is somewhat sensationalized, it's also quite reasonable - as there are numerous problems associated with geoengineering, and many concerns regarding its deployment, or even small scale testing. Which is why NOBODY HAS DONE IT YET. Unfortunately Watson makes the rather bold claim: But what actual evidence does he give for this: Nobody EVER said that planes did not create artificial clouds. This has been known since the 1920s. Contrails ARE artificial clouds. This is an example of Watson either misinterpreting, or not understanding the terminology. The programs he mention are only concerned with measuring aerosols and the effects they have. The term "radiative forcing" just means the difference between incoming and outgoing radiation (sunlight). It's not "forcing" anything. It's a noun, not a verb. The KSLA story was debunked in 2008, but unfortunately keeps cropping up just about every day. The sample was collected by leaving two bowls on the hood of a pickup in a yard for a month. The level of barium found was actually 0.068 ppm, 100 times less than was reported, and only 3% of the EPA limit for taste (not even a toxic limit). The reporter on the story quickly retracted it, and a full explanation can be found here. And ... that's it. That's the only piece of actual evidence they offer. One amateur test that was entirely wrong. Yes, scientists have discussed geoengineering for years. Yes, there are serious concerns about doing any geoengineering. But there is zero evidence that it's actually taking place.