The Aché are a traditional hunter-gatherer tribe in Paraguay. They live off the forests around them. The tribe see themselves as an integral part of their natural surroundings. But making a living is becoming increasingly difficult as their population grows. At the same time, the soya industry is increasingly encroaching on their territory, offering them money to vacate their land. Around 90 percent of the Atlantic rainforest in Paraguay has already been cut down to make way for livestock and industrial farming. A team led by the World Wildlife Fund (WWF) is helping the Ache protect their habitat and way of life by helping them grow traditional Yerba Mate, that helps to regenerate the soil, and is processed into tea. That's helping generate alternative sources of income for the community.