This is maybe most important of the advantages of biomass energy. Biomass is a part of the carbon cycle. Carbon from the atmosphere is absorbed into plants during photosynthesis and when the plant decays or is burnt that carbon goes back into the atmosphere. Because it is a cycle, the next crop of plants absorb that carbon over again, so there is a balance between the amount of carbon that the biomass fuel release into the atmosphere and the amount that they extract from it. This is why biomass fuels do not contribute to global warming. Biomass fuels are clean.
A film was made in 1984 and 1985 which combined Gerald Scarfe 's animations and Nicolas Roeg 's live-action footage with slit scan photography created by Peter Truckel at The Moving Picture Company. Also directed by Nicolas Roeg the film was projected on a backdrop behind the stage as the band played. Three promotional videos were also directed by Roeg. "The Pros and Cons of Hitch Hiking" features snippets of the live action material from the screen films interspersed with footage of "Shane" and other cowboy films. "Sexual Revolution" also featured screen film material interspersed with footage Waters singing the song and playing his bass. "Every Stranger's Eyes" is identical to the screen projection, except for the fact that footage of Waters is also interspersed here.