09:16AM, Monday 04 March 2013
The lights of historic Windsor Castle will go out for one hour on Saturday, March 23, as part of World Wide Fund's Earth Hour.
The project aims to highlight the need for the world to reduce its reliance on fossil fuels, which are used for energy and raise awareness of protecting the planet.
The lights of the castle were also switched off last year for the same event and will be turned off from 8.30-9.30pm.
Visit earthhour.wwf.org.uk for more details.
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