"Overcast" is a groundbreaking documentary about a phenomenon that most of us would consider normal: Jet contrails that spread into clouds, covering the sky and blocking the sun. For some people however, these trails are the biggest environmental crime in the history of mankind.

Based on ideas first outlined in 1974, scientists have developed the basic technology necessary for climate control. Jet planes would be deployed, dispersing large amounts of harmful chemicals into the atmosphere to reflect sunlight back into space.

However, what if this technology known as geoengineering has already been fully implemented for many years, with neither public consent, nor disclosure? Are the jet trails and the whitened skies that we see today the result of such a geoengineering program?

For over a decade now, the phenomenon has given rise to severe controversy and wild speculation. In a challenging investigation this documentary distinguishes the hard scientific facts from lofty speculation. "Overcast" aims - once and for all - to find conclusive answers to one of the most pressing questions of our time.

"Overcast" explores conspiracy theorists, critics, scientists, authorities and experiments to determine whether the aircraft's condensation trails are secretly used for geoengineering. Sometimes interviews are confusing, sometimes enlightening. ETH Zurich's exciting conclusion: kerosene contains up to 16 metals that naturally act as condensation-forming and climate-impacting particles, which is definitely an environmental problem in the face of rising air traffic worldwide.

Director(s): Matthias Hancke
Production: Tristan Albrecht, DEDAL Films
Music: Gustav Brach
Actors: Ulrich Schumann, Patrick Minnis, Jim Haywood, Clifford Carnicom, Ken Caldeira, Markus Gygax, Edward Teller, Ulrike Lohmann, Dietrich Klinghardt, Bernard Tailliez, Werner Altnickel, Riccardo Gaurindo, Russ Tanner, Joachim Curtius, Mick West, Michael Murphy, Michel Chossudovsky, Rebekka Reichlin, Christoph Hueglin, Yves Spring, Bill Vander Zalm, Werner Schultz, Saskia Messager, Karsten Smid
Year: 2015
Duration: 80 min
Picture format: 16:9
Our age recommendation: 16
Language (audio): German, French, English, Spanish
Language (subtitles): German, French, English, Spanish
Country of origin: Switzerland
Shooting Locations: Switzerland, Germany, Canada, Serbia, France, Netherlands, Australia, United States, Spain, United Kingdom
  • This film can be watched for free at the top.


Main topic(s): Climate
Secondary topics: fossil fuel toxins climate tourism health
Mentions: chemtrails condensation trails weather sky airplanes aircraft geo-engineering aluminium barium stroncium sulphate aerosols atmosphere CO2 conspiracy phthalates ETH exhaust gases weapons warfare
Topic Page(s): Climate

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