No Blade of Grass (1970)
1h 36m | IMDb : 5.8
An environmental catastrophe destroys civilization. Led by father John and mother Ann, the Custance clan sets out on a quest for safety in a savage world that may just end up turning them into the very thing they are fleeing.
Director: Cornel Wilde
Cast: Nigel Davenport, Jean Wallace, John Hamill, Lynne Frederick, Patrick Holt, Ruth Kettlewell, M.J. Mathews, Michael Percival, Tex Fuller, Simon Merrick, Anthony Sharp, George Coulouris, Anthony May, Wendy Richard, Max Hartnell, John Lewis, Norman Atkyns, Nigel Rathbone
