Jadav Payeng is an environmental activist. He upgrade a chapori of the river Brahmaputra to a reserve forest. Name of the forest is Mulai Reserve (Mulai is his nickname), near Kokilamukh of Jorhat, Assam, India. Total area of the forest is about 1000 hectare. He started his journey plantation in 1979. Now, there are five tiger, three rhino, reptiles, birds and other animals. There are thousands of trees- simolu, veleu, urium, azar, teak, mos etc. Now his aim is to spread his Mulai Forest to Bongoan of Majuli (world's largest river island).

Mulai began work on the forest in 1980 when the social forestry division of Golaghat district launched a scheme of tree plantation on 200 hectares at Aruna Chapori situated at a distance of five KMs from Kokilamukh in Jorhat district. Mulai was one of the labourers who worked in that project which was completed after five years. He chose to stay back after the completion of the project as others left. He not only looked after the plants, but continued to plant more trees on his own effort slowly transforming the area into a big forest.