Jerry Greenfield
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Social strategy 'absolutely necessary', says Ben and Jerry's co-founder

When Unilever bought Ben and Jerry's in 2012, there was talk of the bigger company becoming more like the ethically friendly ice-cream company.

Whether they have nor not, there is certainly more of a buzz around the idea of corporate responsibility than there used to be.

The BBC's Anthony Reuben spoke to co-founder Jerry Greenfield about sustainability, Unilever, and the importance of big chunks.