Earlier this year nearly 100 world authorities on the environment gathered in London. They included such names as Jacques Cousteau, Thor Heyerdahl, Sir Peter Scott and David Attenborough and their task was to assess what progress had been made in the ten years since the first major United Nations Environment Conference in Stockholm. This film follows their often fierce debate, and illustrates the problems the experts addressed: 2,000 kinds of vertebrate animal in danger of extinction; new urban developments that will cover another 50,000 square miles of agricultural land by the end of the century; tropical forests being chopped down at the rate of an acre per second; the human environment. especially for the world's poor, deteriorating even faster. The picture is not optimistic, so will our grandchildren find us guilty of destroying the planet's life support systems?