Celebrity journalist and recycling campaigner, Janet Street-Porter, has officially opened a new £8million plant which will convert leftover food into heat, power and bio-fertiliser.
The Emerald Biogas site, in Newton Aycliffe, uses an anaerobic digestion process to convert commercial waste food.
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His Royal Highness rounded off his visit to the region by giving a speech at Virgin Money headquarters in Newcastle.
Sunshine and showers tomorrow - but it is the calm before the storm.
Prince Harry joined Steve Cram and Jonathan Edwards in training those taking part in the London Marathon for charity Heads Together.