Presented by Julian Pettifer
Every day, one species - or more - becomes extinct.
Much of our food, fuel and building materials comes from plant and animal resources - but they are running out.
The course of evolution is now up to us - keeping the diversity of plant and animal life is crucial to our survival. This is a global report on the facts, the threats and the future, showing the uses, both potential and realised, of the species around us. Wild plants have now provided successful treatment for certain cancers. A cure for AIDS must be a possibility, but will the choice of genetic diversity survive in our fast-changing world?
BBC Bristol