The definition of what constitutes a clean tech business is changing, as our two-part look at the next green pioneers has demonstrated.
Large, expensive wind and solar projects are just part of the sustainability story. Start-ups are adapting everything from the concept of sharing to the humble postie motorbike to create lean, green ventures.
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Today, we round off our expose of the next generation of clean tech innovators by talking to entrepreneurs who have bold new visions for the removals industry and electricity meters.