Noted environmentalist Kallen Pokkudan, who devoted his life to cultivating and conserving mangroves across Kerala, died here on Sunday following a brief illness. He was 78.

A bachelor, Pokkudan was passionate about conserving the unique coastal ecosystem and he began his green mission during the 1980s, planting over a lakh mangrove trees across the State with the support of the government and other agencies.

The ‘Mangrove Man’ also conducted awareness classes the significance of preserving mangroves and wetland biodiversity.