How ethical are the companies in the official Rio+20 UK delegation?

For the first time at the United Nations Framework Convention on Climate Change, the official UK delegation to Rio+20 includes business representatives. Presumably they are on the delegation because their companies – Aviva and Unilever – are ethical and use sustainable procurement and production methods.

The delegates from Unilever are Paul Polman, Chief Executive, and  Migeul Pestana, Vice President, Global External Affairs. Aviva Investors has sent their Chief Executive, Paul Abberley and Dr Steve Waygood, Chief Responsible Investment Officer.
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