Synthetic fuel is the Bergius process. In this process, coal is liquefied by heating in the presence of hydrogen gas (hydrogenation). Dry coal is mixed with heavy oil recycled from the process. Catalysts are typically added to the mixture. The reaction occurs at between to and 20 to 70 MPa hydrogen pressure. The reaction can be summarized as follows: formula_1 After World War I several plants were built in Germany; these plants were extensively used during World War II to supply Germany with fuel and lubricants. The Kohleoel Process, developed in Germany by Ruhrkohle and VEBA, was used in the demonstration plant
The Secret Life of Plants the basis for the 1979 documentary of the same name, directed by Walon Green and featuring a soundtrack by Stevie Wonder, later released as "Journey through the Secret Life of Plants". The film made use of time-lapse photography (where plants are seen growing in a few seconds, creepers reach out to other plants and tug on them, mushrooms and flowers open). The film was originally distributed by Paramount Pictures. The Secret Life of Plants The Secret Life of Plants (1973) is a book by Peter Tompkins and Christopher Bird. The book documents controversial experiments that claim to reveal unusual phenomena