1: Pastures New. Vast areas of land in the UK are still heavily polluted even though the factories that caused the contamination have long disappeared. Scientists want to use plants and bacteria to clean up the land for development but contractors are still relying on the traditional practice of digging up dirty soil and dumping it in the nearest landfill. How long will it be before the dirty remains of our industrial past are disposed of? Presented by Quentin Cooper. Producer Alison Ayres