Metabunk

In a paper publish in Environmental Research letters, August 2016, 77 scientists with expertise in atmospheric science and geochemistry were asked to give their expert opinions regarding the most common claims of evidence put forward by proponents of the "chemtrail" or "covert geoengineering" theory (referred to in the paper as a "secret large-scale atmospheric program (SLAP)". The evidence being photos of trails left by planes, and chemical analyses of air, soil, and water. The scientists overwhelming rejected the idea that the photos and tests were evidence of a secret spraying program. All of the atmospheric scientists and all but one of the geochemists saw nothing suspicious about the proffered evidence. The photos were all identified as contrails, and the...

A recent photo proports to show a UFO over Loch Ness in Scotland, however it's almost certainly just the reflection of a light inside the room, doubled up by dual pane window.

UPDATE July 10, 2015:

I contacted the owner of the cottage, who graciously agreed to take a few photos and a short video from the same location. These prove conclusively that the "UFO" is simply the reflection of a light in the window:






You can see the reflection of the curtain in the window, just like with the "UFO" photo, which demonstrates that the UFO photo was taken...

A claim by the promoters of the the 9/11 controlled demolition theory is that the dust clouds that were pushed up and out by the collapse of the building were "pyroclastic-like", specifically:

http://www1.ae911truth.org/faqs/347-high-temperatures-persistent-heat-a-molten-steel-at-wtc-site-challenge-official-story.html
The reference that AE911Truth uses to back this up is the site 9-11 Research, a web site that was created in 2003 by Jim Hoffman. Hoffman was a seminal figure in the 9/11 Truth movement, and his early writings were highly influential on the shape that the conspiracy theories took over the first decade after the attacks. Some of his early ideas were quite outlandish, such as...