BANJARSARI, Indonesia: Harini Bambang Wahono’s classroom is a kaleidoscope of greens, a fitting colour scheme for the 77-year-old grandmother who has been teaching green ways for almost 30 years. A poster on the wall commands: "Reduce, recycle, reuse, replant" — the philosophy that Ibu Bambang, as she is known, seeks to spread throughout her Jakarta…
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