Rainer Nõlvak is an entrepreneur and chairman of the Estonian Fund for Nature. He is the founder of several successful IT and technology companies. Rainer led civic action Let's Do It 2008, where 50 000 volunteers cleaned up the countryside of Estonia, in just five hours. Inspired by the Estonian initiative, the movement has spread to 113 countries as the global Let's Do It! World action. To date, 13.8 million people have been participating in national cleanup campaigns. Rainer lives on the island Hiiumaa.