In 2010, a $3.6billion fund was launched to stop oil drilling in the most biodiverse place on the planet: the Yasuni national park in Ecuador.

The Yasuni covers 10,000 square kilometres of Amazon rainforest and is home to thousands of species of plants and animals but underneath the soil lies another important resource - 20% of Ecuador’s oil reserves.

It was feared that any drilling would cause pollution, deforestation and soil erosion so in a pioneering deal – known as the Yasuni ITT iniatitive - rich nations were asked to pay Ecuador not to remove the oil.

Chief negotiator Yvonne A-Baki was put in charge of raising funds from around the globe but securing money was not an easy task, as she tells Jane Wilkinson.

(Photo: A brown woolly monkey in the Yasuni National Park. Credit: Pablo Cozzaglio/AFP via Getty Images)