It uses 3 per cent of the global supply each year and has committed to having a fully sustainable supply by 2015.

The rise of superbugs, infections resistant to existing treatments, means that more than ever we need a sustainable supply of new antibiotics.

In due course coppice management was used to ensure a more sustainable supply.

Since that time, management principles have changed in order to reflect rising awareness of environmental needs and to provide recreational facilities whilst seeking to maintain a sustainable supply of timber.

The charity establishes sustainable supplies of clean water and mechanisms to create safer sanitation, using innovative yet simple technologies that can be locally maintained.