Sumarni Laman received a bachelor's degree in Chemistry Education from Palangkaraya University. She has expertise in biological resources and water management and is passionate about education. Her interest in environmental issues inspired her to volunteer for Ranu Welum in 2017. She became official staff in 2019 and serves as Youth Act coordinator. Sumarni manages communication & public relations for Ranu Welum. She is currently running The Heartland Project - a national movement to raise awareness about forest issues through planting trees on forestland that was previously burned or mined. The Heartland Project has already engaged over 1000 participants and planted more than 2,500 trees. They also raise awareness about plastic pollution, engage people in climate action, and produce events to cultivate pride in Dayak traditions and culture. Sumarni will be both a participant and a coordinator at our Bali collaboratory.