Once considered crazy by fellow villagers, Indonesian eco-warrior Sadiman has turned barren hills green after 24 years of effort, making water resources available in the drought-prone mountainous region where he lives.

Affectionately addressed as ‘mbah’ or ‘grandpa’, the 69-year-old has worked relentlessly to plant trees in the hills of central Java after fires to clear the land for cultivation nearly dried up its rivers and lakes.