For 20 years, the image of the earth floating in space has been adopted by environmentalists to suggest the planet's wholeness and vulnerability, as a challenge to industrialism and consumerism. But the meaning of the icon is changing with the advent of global telecommunications and finance. As part of Science Week, Horizon explores the implications of these changes and asks what the future holds. See today's choices.
TRANSCRIPT: please send a cheque for £4.50. payable to BSS, to Horizon: Icon Earth, [address removed] Please allow 28 days for delivery.