latimes.com:

Darvish, working from a state-run botanical reserve on the western outskirts of this traffic-clogged capital, is a subtle but persistent voice, direct but non-threatening in his message as he warns about desertification, deforestation, pollution, climate change and other perils to this mostly arid land.

Unlike the country's understandably edgy political activists, who face the constant threat of police harassment, Darvish has a carefree demeanor. Each Sunday, he spreads his message in a morning spot on state TV. He also writes a widely read environmental column in a moderate newspaper and a blog focusing on Iran's ecology.

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