Who are the Sustainability Leaders (Besides Unilever)?

Most would agree that some corporate giants have taken great strides toward sustainability in recent years. But experts in the field still cite too few companies doing so.
Instead, our latest GlobeScan/SustainAbility Leadership survey finds that experts believe that other non-governmental actors have been driving the sustainable development agenda since the United Nations Earth Summit in Rio in 1992. The business sector is not seen as the driver, with few exceptions.
What, if anything, can we learn from those few companies that have earned recognition from practitioners for their leadership?
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