The Poo Project, since renamed the Snow White Facility, provides walkers with biodegradable bags and plastic containers to keep them in.

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The government, local non-governmental organisations and the UN Programme for Development (UNDP) have been promoting the use of new biodegradable bags, the Mauritanian Information Agency reports.

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They then compare it to one of their biodegradable tea bags, with its aromatic whole leaves.

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Symphony Plastics have been supplying oxo-biodegradable plastic bags to Co-operative supermarkets in the UK for five years, and the UK's Periodical Publishers Association recommends that their members use their products.

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And among other recent announcements from stores on green issues, Tesco has said it plans to follow the Co-Op's lead by making its carrier bags biodegradable.

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