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Rainer Nõlvak has advocated for the Estonian energy industry to move away from oil shale and move towards renewable energy systems. He has published the "Green Energy" program.
He was among the organizers of Let's Do It 2008, a civic action with 50 000 volunteers participating in cleaning up the countryside of Estonia in one day. Because of this he received the 2008 Estonian Volunteer of the Year national award. The movement has initiated the global Let's Do It! World action.
He founded the following companies: Microlink Baltics, Curonia Research, Celecure.
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